In the law it is written: "With men of other tongues and other lips I will speak to this people; And yet, for all that, they will not hear Me," says the Lord.
1 Corinthians 14:21
Surrounding context
14:20 Brethren, do not be children in understanding; however, in malice be babes, but in understanding be mature.
14:21 In the law it is written: "With men of other tongues and other lips I will speak to this people; And yet, for all that, they will not hear Me," says the Lord.
14:22 Therefore tongues are for a sign, not to those who believe but to unbelievers; but prophesying is not for unbelievers but for those who believe.