Ephrem and Aphrahat are the two principal 4th-century Syriac Fathers and share the same theological idiom (typological exegesis, anti-Jewish polemic, ascetic ideals). Direct citation is not preserved; the link is the shared Syriac milieu and parallel content noted by modern scholarship.
Murray, Symbols of Church and Kingdom (CUP 1975), pp. 29-38 · Brock, The Luminous Eye (Cistercian 1992), ch. 1
Aphrahat (writing 337-345 in Sasanian Persia) and Ephrem (in Roman Nisibis/Edessa) are the two great early Syriac authors and near-contemporaries. Direct contact is not attested in primary sources; the linkage is a scholarly/traditional pairing of the founders of Syriac theological literature.
Sebastian Brock, A Brief Outline of Syriac Literature · ODCC s.v. Aphraates
