King James Version (KJV)
Set a watch, O LORD, before my mouth; keep the door of my lips.
Modern English
Set a guard, O LORD, over my mouth; keep watch over the door of my lips!
Hebrew
שִׁ֥יתָה יְהוָ֗ה שָׁמְרָ֥ה לְפִ֑י נִ֝צְּרָ֗ה עַל דַּ֣ל שְׂפָתָֽי׃
shiytah yhvah shamrah lpiy niṣrah ʿal dal shpatay