John 1:12

Clement of Alexandria Stromata Book IV

It is not the poor simply, but those that have wished to become poor for righteousness' sake, that He pronounces blessed-those who have despised the honours of this world in order to attain "the good; "likewise also those who, through chastity, have become comely in person and character, and those who are of noble birth, and honourable, having through righteousness attained to adoption, and therefore "have received power to become the sons of God,"[24]

Tertullian On Prayer

The prayer begins with a testimony to God, and with the reward of faith, when we say, "Our Father who art in the heavens; "for (in so saying), we at once pray to God, and commend faith, whose reward this appellation is. It is written, "To them who believed on Him He gave power to be called sons of God."[9]

Archelaus Acts of the Disputation with the Heresiarch Manes

For many have also perished after the period of Christ's advent on to this present period, and many are still perishing,-those, to wit, who have not chosen to devote themselves to works of righteousness; whereas only those who have received Him, and yet receive Him, "have obtained power to become the sons of God."[245]