1 Corinthians 14:20-22

Diaglott(i) 20 Brethren, not children become you in the mind; but in the evil be you child like, in the and minds perfect ones become you. 21 In the law it has been written: That by other tongues and by lips others I will speak to the people this, and not even so will they listen to me, says Lord. 22 So that the tongues for a sign are, not to those believing, but to the unbelievers; the but prophesies not to the unbelieving, but to those believing.