Psalm 141:3

Set, O Jehovah, a watch for my mouth, Watch Thou over the door of my lips.

Micah 7:5

Believe not in a friend, trust not in a leader, From her who is lying in thy bosom keep the openings of thy mouth.

Psalm 39:1

To the Overseer, to Jeduthun. -- A Psalm of David. I have said, 'I observe my ways, Against sinning with my tongue, I keep for my mouth a curb, while the wicked is before me.'

Psalm 17:3-5

Thou hast proved my heart, Thou hast inspected by night, Thou hast tried me, Thou findest nothing; My thoughts pass not over my mouth.

Psalm 34:13

Keep thy tongue from evil, And thy lips from speaking deceit.

Psalm 71:8

Filled is my mouth with Thy praise, All the day with Thy beauty.

James 1:26

If any one doth think to be religious among you, not bridling his tongue, but deceiving his heart, of this one vain is the religion;

James 3:2

for we all make many stumbles; if any one in word doth not stumble, this one is a perfect man, able to bridle also the whole body;

Treasury of Scripture Knowledge

Summary

Set a watch, O LORD, before my mouth; keep the door of my lips.

Bible References

Set a watch

Psalm 17:3
Thou hast proved my heart, Thou hast inspected by night, Thou hast tried me, Thou findest nothing; My thoughts pass not over my mouth.
Psalm 39:1
To the Overseer, to Jeduthun. -- A Psalm of David. I have said, 'I observe my ways, Against sinning with my tongue, I keep for my mouth a curb, while the wicked is before me.'
Psalm 71:8
Filled is my mouth with Thy praise, All the day with Thy beauty.
Micah 7:5
Believe not in a friend, trust not in a leader, From her who is lying in thy bosom keep the openings of thy mouth.
James 1:26
If any one doth think to be religious among you, not bridling his tongue, but deceiving his heart, of this one vain is the religion;
James 3:2
for we all make many stumbles; if any one in word doth not stumble, this one is a perfect man, able to bridle also the whole body;