Psalms 141:3-5

Set a guard over my mouth, O LORD; keep watch over the door of my lips. Let not my heart be drawn to what is evil, to take part in wicked deeds with men who are evildoers; let me not eat of their delicacies. Let a righteous man strike me - it is a kindness; let him rebuke me - it is oil on my head. My head will not refuse it. Yet my prayer is ever against the deeds of evildoers.