Matthew 3:9

καὶ μὴ δόξητε λέγειν ἐν ἑαυτοῖς· πατέρα ἔχομεν τὸν Ἀβραάμ· λέγω γὰρ ὑμῖν ὅτι δύναται ὁ Θεὸς ἐκ τῶν λίθων τούτων ἐγεῖραι τέκνα τῷ Ἀβραάμ.

And do not think you can say within yourselves, We have Abraham as our father; for I say to you, that God is able from these stones to raise up children for Abraham.