Lukas 3:8

Therefore, produce p'ri tov l'teshuva (fruit worthy of repentance), and do not begin to presume within yourselves, saying, We have the zechut Avot (merit of the Fathers) of Avraham Avinu, for, I say to you, that Hashem is able from these avanim (stones) to raise up banim to Avraham Avinu.