Matthew 5:19

Epistle of Ignatius to the Ephesians

It is good to teach, if he who speaks also acts. For he who shall both "do and teach, the same shall be great in the kingdom."[109]

Clement of Alexandria Stromata Book II

He is the Gnostic, who is after the image and likeness of God, who imitates God as far as possible, deficient in none of the things which contribute to the likeness as far as compatible, practising self-restraint and endurance, living righteously, reigning over the passions, bestowing of what he has as far as possible, and doing good both by word and deed. "He is the greatest," it is said, "in the kingdom who shall do and teach; "[218]

Cyprian Epistle LXII

Moreover, in another place He establishes it, saying, "Whosoever shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven."[32]

Cyprian Epistle LXXVI

All which things, most brave and faithful soldiers of Christ, you have suggested to your brethren, fulfilling in deeds what ye have previously taught in words, hereafter to be greatest in the kingdom of heaven, as the Lord promises and says, "Whosoever shall do and teach so, shall be called the greatest in the kingdom of heaven."[13]

Cyprian Treatise X On Jealousy and Envy

why does he who falsely asserts himself to be a Christian, dishonour the flock of Christ? To put on the name of Christ, and not to go in the way of Christ, what else is it but a mockery of the divine name, but a desertion of the way of salvation; since He Himself teaches and says that he shall come unto life who keeps His commandments, and that he is wise who hears and does His words; that he, moreover, is called the greatest doctor in the kingdom of heaven who thus does and teaches;[28]

Cyprian Treatise XII Three Books of Testimonies Against the Jews

Also in the Gospel according to Matthew: "He who shall do and teach so, shall be called greatest in the kingdom of heaven."[773]

Constitutions of the Holy Apostles Book II

Wherefore he says: "Whosoever shall do and teach, he shall be called great in the kingdom of God."[34]

Origen Commentary on Matthew Book XIII

least, and who occupied the middle position, they further desired to know; unless, indeed, it is more accurate to say that they knew who was least from the words, "Whosoever shall break one of these least commandments, and shall teach men so, shall be called least in the kingdom of heaven; "but who was the greatest of all they did not know, even if they had grasped the meaning of the words, "Whosoever shall do and teach them, the same shall be called great in the kingdom of heaven; "[99]