Psalm 141:3 in the King James Version
Set a watch, O LORD, before my mouth; keep the door of my lips.
Context
2 Let my prayer be set before you like incense; the lifting up of my hands like the evening sacrifice.
3 Set a watch, LORD, before my mouth. Keep the door of my lips.
4 Don’t incline my heart to any evil thing, to practice deeds of wickedness with men who work iniquity. Don’t let me eat of their delicacies.