1 Corinthians 14:6-12

King James Version

⁶ Now, brethren, if I come unto you speaking with tongues, what shall I profit you, except I shall speak to you either by revelation, or by knowledge, or by prophesying, or by doctrine?

⁷ And even things without life giving sound, whether pipe or harp, except they give a distinction in the sounds, how shall it be known what is piped or harped?

⁸ For if the trumpet give an uncertain sound, who shall prepare himself to the battle?

⁹ So likewise ye, except ye utter by the tongue words easy to be understood, how shall it be known what is spoken? for ye shall speak into the air.

¹⁰ There are, it may be, so many kinds of voices in the world, and none of them is without signification.

¹¹ Therefore if I know not the meaning of the voice, I shall be unto him that speaketh a barbarian, and he that speaketh shall be a barbarian unto me.

¹² Even so ye, forasmuch as ye are zealous of spiritual gifts, seek that ye may excel to the edifying of the church.