CLEM. ALEX. (†220) in his Eclogæ propheticæ, § I, quotes several verses with ἐν τῷ Δανιὴλ γέγραπται.
HIPPOLYTUS (†230) recognizes the Song of the Three in his comment on Daniel, in loc., as well as in the Fragment preserved in the "Catena Patrum in Psalmos et Cantica" (Ante-Nic. Christian Lib. p. 484). In the former place he comments on the words καὶ διεχεῖτο ἡ φλόξ, and says that the Three ἐδροσίζοντο in reference to v. 50; in the latter, on the verse "O Ananias, Azarias," etc., he notes that everything is called to praise, ἵνα μὴ ὡς ἐλεύθερον αὐτεξούσιον νομισθῇ.
TERTULLIAN (†240) de Orat. § 15, says that they prayed, "in fornace Babylonii regis orantes." In § 29 he quotes vv. 26, 27.
ORIGEN (†254) Comm. in Ep. ad Rom. I. c. 10, II. c. 9, VII. c. 1; Comm. in Matt. XIII. c. 2 (naming the LXX); and in de Oratione XIII. XIV.
CYPRIAN (†258) De lapsis 31 and De dom. orat. 8, quotes this piece, in the latter case agreeing with Θ rather than Ο´. Pseudo-Cypr. (some of whose writings Professor Swete, Patristic Study, 1902, p. 67, deems to be contemporary with Cyprian or nearly so) in Oratio II. 2 says "misisti angelum tuum cum roribus tuis," agreeing with Ο´.
EUSEBIUS (†342), in his first Fragm. on Daniel, comments on iii. 49, ὡσει πνεῦμα δρόυ διασυρίζον (Θ), and quotes Psalm xxviii. 7 as illustrative. (In Constantine's "To the Convention of Saints," given in the translation of Eusebius (Camb. 1683), much mention is made of Daniel in Babylon, but there is no clear indication of knowledge of the additions.)
ATHANASIUS (†373) quoted the Song in Ep. Pasch. x. 3; and in Agst. Avians II. 71 he employs the Song to "arraign the Arian irreligion" (Newman's translation).
EPHREM SYRUS (†378). His commentary on Daniel does not embrace the additions, but in his Morning Hymn, rendered by H. Burgess (Lond. 1853), we have "Sprinkle me with Thy dew, like the young men in the furnace."
CYRIL OF JERUSALEM (†386) quotes both the Prayer of Azarias (v. 29) and the Song (v. 54) in Catech. II. 18 and IX. 3 respectively, without hesitation (ed. Reischl, Munich, 1848).
AMBROSE (†397) in Luc. VII "Cantaverunt Hebræi cum vestigia eorum tactu flammæ rorantis humescerent."