Matthew 5:48

Epistle of Ignatius to the Philadelphians

of whose kindness the Lord, wishing us also to be imitators, says, "Be ye perfect, even as also your Father that is in heaven is perfect."[23]

Clement of Alexandria Stromata Book VI

Thence assimilation to God the Saviour arises to the Gnostic, as far as permitted to human nature, he being made perfect "as the Father who is in heaven."[184]

Clement of Alexandria Stromata Book VII

For all men are the work of one will. And is it not the Saviour, who wishes the Gnostic to be perfect as" the heavenly Father,"[132]

Tertullian Against Marcion Book I

But as God is eternal and rational, so, I think, He is perfect in all things. "Be ye perfect, even as your Father which is in heaven is perfect."[300]

Tertullian On the Apparel of Women Book II

turn aside from them, as in all other things, so also in your gait; since you ought to be "perfect, as (is) your Father who is in the heavens."[8]

Origen de Principiis Book II

The injunction also of the Saviour, when exhorting His disciples to the exercise of kindness, "Be ye perfect, even as your Father who is in heaven is perfect; for He commands His sun to rise upon the evil and the good, and sendeth rain on the just and on the unjust,"[34]

Origen de Principiis Book IV

and, "Be ye perfect, even as your Father also is perfect."[67]

Origen Against Celsus Book IV

And therefore we are taught to become "perfect," as our Father in heaven is perfect.[124]