'Faint Not' in the Bible

Wherefore, having this ministry, even as we received mercy, we faint not;

Wherefore we faint not, but, even if, our outer man, is decaying, nevertheless, our inner man , is renewing day by day.

And, in doing that which is honourable, let us not be fainthearted; for, in due season, we shall reap, if we faint not.