'Avow' in the Bible

and then will I avow unto them, I never knew you. Depart from me, workers of lawlessness.

Nevertheless even from among the Rulers many believed in Him. But because of the Pharisees they did not avow their belief, for fear they should be shut out from the synagogue.

But this I avow to thee, that in the way which they call sect, so I serve my fathers' God, believing all things which are written throughout the law, and in the prophets;