Proverbs 30:32

If thou be so foolish to magnify thyself, or meddlest with any such thing, then lay thine hand upon thy mouth.

Job 21:5

Mark me well, and be abashed, and lay your hand upon your mouth.

Job 40:4

"Behold, I am too vile a person to answer thee, therefore will I lay my hand upon my mouth.

Proverbs 17:28

Yea, a very fool, when he holdeth his tongue, is counted wise; and to have understanding, when he shutteth his lips.

Proverbs 26:12

If thou seest a man that is wise in his own conceit, there is more hope in a fool than in him.

Ecclesiastes 8:3-4

Be not hasty to go out of his sight, and see thou continue in no evil thing: for whatsoever it pleaseth him, that doeth he.

Micah 7:16-17

This shall the Heathen see, and be ashamed for all their power: so that they shall lay their hand upon their mouth, and stop their ears.

Romans 3:19

Yea and we know that whatsoever the law saith, he saith it to them which are under the law: That all mouths may be stopped, and all the world be subdued to God,

Treasury of Scripture Knowledge

Summary

If thou hast done foolishly in lifting up thyself, or if thou hast thought evil, lay thine hand upon thy mouth.

Bible References

Thou hast done

Proverbs 26:12
If thou seest a man that is wise in his own conceit, there is more hope in a fool than in him.
Ecclesiastes 8:3
Be not hasty to go out of his sight, and see thou continue in no evil thing: for whatsoever it pleaseth him, that doeth he.

Lay

Proverbs 17:28
Yea, a very fool, when he holdeth his tongue, is counted wise; and to have understanding, when he shutteth his lips.
Job 21:5
Mark me well, and be abashed, and lay your hand upon your mouth.
Job 40:4
"Behold, I am too vile a person to answer thee, therefore will I lay my hand upon my mouth.
Ecclesiastes 8:4
Like as when a king giveth a charge, his commandment is mighty: Even so whom may say unto him, "What doest thou?"
Micah 7:16
This shall the Heathen see, and be ashamed for all their power: so that they shall lay their hand upon their mouth, and stop their ears.
Romans 3:19
Yea and we know that whatsoever the law saith, he saith it to them which are under the law: That all mouths may be stopped, and all the world be subdued to God,