Proverbs 18:21
Death and life are in the power of the tongue, And those who love it will eat its fruit. (NKJV)

The tongue can bring death or life; those who love to talk will reap the consequences. (NLT)

What you say can preserve life or destroy it; so you must accept the consequences of your words. (GNT)

Words kill, words give life; they’re either poison or fruit—you choose. (MSG)

Mark 11:22-23
So Jesus answered and said to them, “Have faith in God. For assuredly, I say to you, whoever says to this mountain, ‘Be removed and be cast into the sea,’ and does not doubt in his heart, but believes that those things he says will be done, he will have whatever he says.”

Hebrews 11:3
By faith we understand that the worlds were framed by the word of God.”