See Cat. iv. 7; xi. 17.  The clause, καὶ καθίσαντα ἐκ δεξιῶν τοῦ Πατρός, does not occur in the original form of the Nicene Creed, but is found in the Confession of Faith contained in Const. Apost. c. 41, in the four Eusebian Confessions of Antioch (341, 2 a.d.), and in the Macrostichos (344 a.d.).  An equivalent clause is found in the brief Confession of Hippolytus (circ. 220 a.d.) Contra Hæres. Noeti, c. 1:  “καὶ ὄντα ἐν δεξίᾳ τοῦ Πατρός,” and in Tertullian, De Virgin. Veland. c. 1:  “Regula quidem Fidei una omnino est, sola immobilis et irreformabilis,.…sedentem nunc ad dextram Patris:”  de Præscriptione, c 13:  “Regula est autem fidei.…sedisse ad dexteram Patris:”  adversus Praxean, c. 2:  “sedere ad dexteram Patris.”