2 Corinthians 13:2-3

Since you are demanding proof that the Anointed One is speaking through me, I will give you proof by exercising discipline among you. For just as I told you the last time I was there—and now, though absent, I say it again—that when I come I will not go easy on those whom I’ve already warned and those who continue to persist in their sin. Christ is not weak or feeble in his dealings with you but mighty and powerful within you.