1 John 3:10

10Throughἐνthisτούτῳmanifestφανεράareἐστινtheτὰchildrenτέκνατοῦof Godθεοῦandκαὶtheτὰchildrenτέκναof theτοῦdevilδιαβόλου·AnyoneπᾶςὁnotμὴpracticingποιῶνrighteousnessδικαιοσύνηνnotοὐκisἔστινofἐκτοῦGodθεοῦ,and alsoκαὶthe [one]ὁnotμὴlovingἀγαπῶνtheτὸνbrotherἀδελφὸνof himαὐτοῦ.

In this the children of God and the children of the devil are manifest: everyone not doing righteousness is not of God, and the one not loving his brother.