'Confirmation' in the Bible

This will be your confirmation that I have spoken the truth: This year you will eat what grows wild, and next year what grows on its own from that. But in the third year you will plant seed and harvest crops; you will plant vines and consume their produce.

"In those times many will oppose the king of the south. Those who are violent among your own people will rise up in confirmation of the vision, but they will falter.