Matthew 5:48

Ἔσεσθε οὖν ὑμεῖς τέλειοι ὡσπερ ὁ Πατὴρ ὑμῶν ὁ ἐν τοῖς οὐρανοῖς τέλειός ἐστι.

Be you therefore perfect, just as your Father who is in Heaven is perfect.