'Proof' in the Bible

So the Jews asked Him, "What proof of your authority do you exhibit to us, seeing that you do these things?"

But the testimony which I have is far greater than the testimony of John; for the works that the Father has given Me to finish—the very same works [that is, the miracles and proofs of My deity] that I am [now] doing—testify about Me, [by providing evidence] that the Father has sent Me.

For this reason the crowd went to meet Him, because they heard that He had performed this [miraculous] sign.