The Cave of Treasures, sometimes referred to simply as The Treasure, is a book of the New Testament apocrypha.
This text is attributed to Ephrem Syrus, who was born at Nisibis soon after AD 306 and died in 373, but it is now generally believed that its current form is 6th century or newer.
The assertion that the Cave of Treasures was written in the 4th century is supported by the general contents of the work. These reproduce Ephrem's peculiar methods of exegesis and supply many examples of his methods in religious argument, with which we are familiar from his other writings. His pride in the antiquity of the Syriac language also appears in this work. That it was written in Mesopotamia by a Syrian, there is no doubt, and if Ephrem was not the original author, or perhaps later editor, belonged to the school of Ephrem.
The oldest Christian work on the history of God's dealing with man from Adam to Christ is probably the anonymous Conflict of Adam and Eve with Satan, which, in its original form, is from the 5th or 6th century AD. The writer of the Cave of Treasures borrowed largely from the Conflict of Adam and Eve, or shared a common source with it.
The Cave of Treasures was introduced to the world by Giuseppe Simone Assemani, the author of the Catalogues of Oriental Manuscripts in the Vatican Library, which he printed in Bibliotheca Orientalis in four thick volumes folio. In Vol. ii. page 498 he describes a Syriac manuscript containing a series of apocryphal works, and among them is one the title of which he translates Spelunca Thesaurorum. He saw that the manuscript contained the history of 5,500 years, from the creation of Adam to the birth of Christ, and that it was based upon the Scriptures. He says that fables are found in it everywhere, especially concerning the antediluvian Patriarchs, and the genealogy of Christ and His Mother. He mentions that the Patriarch Eutychius also describes a cave of treasures in which gold, frankincense, and myrrh were laid up, and refers to the "portentosa feminarum nomina," women of Jesus' ancestry. No attempt was made to publish the Syriac text; in fact, little attention was paid to it until August Dillmann began to study the Conflict of Adam and Eve in connection with it, and then he showed in Ewald's Jahrbüchern (Bd. V. 1853) that the contents of whole sections of the Book of the Cave of Treasures in Syriac and the Conflict of Adam and Eve in Ethiopic were identical. And soon after this, Dillmann and others noticed that an Arabic manuscript in the Vatican (No. XXXIX; see Assemânî, Bibl. Orient. i. page 281) contained a version of the Cave of Treasures, which had clearly been made from the Syriac. In 1883 Carl Bezold published a translation of the Syriac text of the "Cave of Treasures" made from three manuscripts (Die Schatzhöhle, Leipzig, 1883), and five years later published the Syriac text of it, accompanied by the text of the Arabic version.