Apostolic Canons (pp. 29; 43; 49 (Lagarde); Const. ii. 26; iv. 1; vii. 22).
Concilia Carthaginiensia (vii.—tris).
Ps. Justin (Expos. Rect. Fid. v.).
Tertullian (De Baptismo xiii.).
Cyprian (Epist. ad Jubaianum v.; xxv. 2 tingentes; lxiii. 18; ad Novatianum Heret. iii.—3rd cent.; Testimon. II. xxvi. tingentes).
Eusebius (c. Marcell. I. i.).
Athanasius (Epist. Encycl. i.; Epist. ad Serap. i. 6; 28; ii. 6; iii. 6; iv. 5; de Syn. 23; De Titulis Ps. 148).
Basil (Adv. Eunom. v. 299; De Fide 4; De Bapt. I. 1; ii. 6; Epist. Class. I. viii. 11; II. ccx. 3).
Didymus (De Trin. i. 30; 36; ii. 5; iii. 23).
Cyril Jerus. (Cat. xvi. 4).