Psalm 141:3
Set a watch, O LORD, before my mouth; keep the door of my lips.
Proverbs 4:24
Put away from thee a froward mouth, and perverse lips put far from thee.
Proverbs 5:2
That thou mayest regard discretion, and that thy lips may keep knowledge.
Much can be said about keeping your lips sealed, however discretion with the lips/mouth is the message that the Bible speaks about. Words that flow out of the mouth lasts a lifetime. Have someone cursed you with their lips?