The source is Roman Catholic, the content edifying for this day of the revelation of St. Stephen’s relics:
The Traditional Catholic Liturgy
Adapted from The Liturgical Year by Abbot Gueranger
Finding of the Relics of St. Stephen, Protomartyr (August 3)
Urged by the approach of St. Laurence's triumph, St. Stephen rises to assist at his combat; it is a meeting full of beauty and strength, revealing the work of eternal Wisdom in the arrangement of the sacred cycle. But the present Feast has other teachings to offer us.
The fierce auxiliaries of God's anger against idolatrous Rome, after reducing the false gods to powder, must in their turn be subjugated; and this second victory will be the work of the Martyrs aiding the Church by their miracles, as the first was that of their faith—despising death and tortures. The received method of writing history in our days ignores such considerations; that is no reason why we should follow the fashion; the exactitude of its data, on which the science of this age plumes itself, is but one more proof that falsehood is as easily nurtured by omissions as by positive misstatements. Now the more profound the silence on the question, the more certain it is that the very years which beheld the barbarians invading and overturning the Empire were signalized by an effusion of virtue from on high, comparable in more than one respect to that which marked the times of the apostolic preaching. Nothing less was required to reassure the faithful on the one hand, and on the other to inspire with respect for the Church these brutal invaders, who knew no right but might, and felt nothing but disdain for the race they had conquered.
The divine intention in surrounding the fall of Rome in 410 with discoveries of Saints' bodies was clearly manifested in the most important of these discoveries, the one we celebrate today. The year 415 had opened. Italy, Gaul, and Spain were being invaded; Africa was about to share their fate. Amidst the universal ruin the Christians, in whom alone resided the hope of the world, put up their petitions at every sanctuary to obtain at least, according to the expression of the Spanish priest, Avitus, "that the Lord would inspire with gentleness those whom He suffered to prevail." It was then that took place that marvelous revelation which the severe critic Tillemont, convinced by the testimony of the time (Idati, Marcellini, Sozomenis, Augustini, etc.) allows to be "one of the most celebrated events of the fifth century." Through the intermediary of the priest Lucian, John, the Bishop of Jerusalem, received from St. Stephen the first Martyr and his companions in the tomb a message couched in these terms: "Make haste to open our sepulcher, that by our means God may take pity on His people in the universal tribulation." The discovery, accomplished in the midst of prodigies, was published to the whole world as the sign of salvation. St. Stephen's relics, scattered everywhere in token of security and peace, wrought astonishing conversions; innumerable miracles, "like those of ancient times," bore witness to the same Faith of Christ which the Martyr had confessed by his death four centuries earlier.
Such was the extraordinary character of this manifestation, so astonishing was the number of resurrections of the dead, that St. Augustine, addressing his people, deemed it prudent to lift their thoughts from St. Stephen the servant to Christ his Master. "Though dead," said he, "he raises the dead to life, because in reality he is not dead. But as heretofore in his mortal life, so now, too, he acts solely in the Name of Christ; all that you see now done by the memory of St. Stephen is done in that Name alone, that Christ may be exalted, Christ may be adored, Christ may be expected as Judge of the living and the dead."
Let us conclude with this praise addressed to St. Stephen a few years later by Basil of Seleucia, which gives so well in a few words the reason of this Feast: "There is no place, no territory, no nation, no far-off land, that has not obtained the help of thy benefits. There is no one, stranger or citizen, barbarian or Scythian, that does not experience, through thy intercession, the greatness of heavenly realities." (Oratio 41, De S. Stephano)
The following lessons from the Breviary epitomize and complete the history given by the priest Lucian:
During the reign of the Emperor Honorius the bodies of St. Stephen the Protomartyr, Gamaliel, Nicodemus, and Abibo were found near Jerusalem. They had long lain buried, unknown and neglected, when they were revealed by God to a priest named Lucian. While he was asleep, Gamaliel appeared to him as a venerable old man, and showed him the spot where the bodies lay, commanding him to go to Bishop John of Jerusalem, and persuade him to give these bodies more honorable burial.
On hearing this, the Bishop of Jerusalem assembled the neighboring bishops and clergy, and went to the spot indicated. The tombs were found, and from them exhaled a most sweet odor. At the rumor of what had occurred, a great crowd came together, and many of them who were sick and weak from various ailments went away perfectly cured. The sacred body of St. Stephen was then carried with great honor to the Holy Church of Sion. Under Theodosius the Younger it was carried to Constantinople, and from thence it was translated to Rome under Pope Pelagius I and placed in the tomb of St. Laurence the Martyr, in Agro Verano.
What a precious addition to the history of St. Stephen in Sacred Scripture is furnished us by the story of his finding! We now know who were those "God-fearing men who buried Stephen and made great mourning over him." Gamaliel, the master of Saul—later, St. Paul, the Doctor of the Gentiles—had been, before his disciple, conquered by Our Lord; inspired by Jesus, he honored, after his death, the humble soldier of Christ with the same cares which had been lavished by Joseph of Arimathea, the noble counselor, on the Man-God, and laid his body in the new tomb prepared for himself. Soon Nicodemus, Joseph’s companion in the pious work of Good Friday, hunted by the Jews in that persecution in which St. Stephen was the first victim, found refuge near his sacred relics, and dying a holy death was laid to rest beside him. The respected name of Gamaliel prevailed over the angry synagogue. While the family of Annas and Caiphas kept in its hands the priestly power through the precarious favor of Rome, Gamaliel—the grandson of Hillel—left to his descendants preeminence in knowledge, and his eldest line remained for four centuries the depositories of the only moral authority then recognized by the dispersed Israelites. But more fortunate was he in having, by hearing the Apostles and St. Stephen, passed from the science of shadows to the light of realities—from the Law to the Gospel, from Moses to Him whom Moses announced. More happy than his eldest born was his beloved son, Abibo, baptized with his father at the age of twenty, who, passing away to God, filled the tomb next to St. Stephen's with the sweet odor of heavenly purity. How touching was the last will of the illustrious father, when, his hour being come, he ordered the grave of Abibo to be opened for himself, that father and son might be seen to be twin brothers born together to the only true light!
Let us pray: The munificence of Our Lord had placed thee in death, O St. Stephen, in worthy company. We give thanks to the noble person who showed thee hospitality for thy last rest; and we are grateful to him for having, at the appointed time, himself broken the silence kept concerning him by the delicate reserve of the Scriptures. Here again we see how the Man-God wills to share His own honors with His chosen ones. Thy sepulcher, like His, was glorious; and when it was opened, the earth shook, the bystanders believed that Heaven had come down; the world was delivered from a desolating drought, and amid a thousand evils hope sprang up once more. Now that the Roman Church possesses thy body and Gamaliel has yielded to St. Laurence the right of hospitality, rise up once more, O St. Stephen, and deliver us from the new barbarians, by converting them, or wiping them off the face of the earth given by God to His Christ.
And from Pravoslavie, the burial place of St. Stephen revealed near Jerusalem: http://www.pravoslavie.ru/english/75301.htm
Holy Proto-martyr, Stephen, pray for us!