Compare Psalms 39:1

OEB Psalms 39:1

For the leader; for Jeduthun. A psalm of David.

I vowed to watch my words, and sin not with my tongue, but to put on my mouth a muzzle, while the wicked were in my presence.

KJV Psalms 39:1

To the chief Musician, [even] to Jeduthun, A Psalm of David. I said, I will take heed to my ways, that I sin not with my tongue: I will keep my mouth with a bridle, while the wicked is before me.