The Book of PsalmsPsalm 3
Domine, quid multiplicati. The prophet's danger and delivery from his son Absalom: mystically, the passion and resurrection of Christ.
The Douay-Rheims numbers the Psalms as the Latin Vulgate does. In Bibles translated from the Hebrew this is Psalm 3. Read Psalm 3 in the WEBC.

3The psalm of David when he fled from the face of his son Absalom.
2Why, O Lord, are they multiplied that afflict me? many are they who rise up against me.
3Many say to my soul: There is no salvation for him in his God.
4But thou, O Lord art my protector, my glory, and the lifter up of my head.
5I have cried to the Lord with my voice: and he hath heard me from his holy hill.
6I have slept and taken my rest: and I have risen up, because the Lord hath protected me.
7I will not fear thousands of the people, surrounding me: arise, O Lord; save me, O my God.
8For thou hast struck all them who are my adversaries without cause: thou hast broken the teeth of sinners.
9Salvation is of the Lord: and thy blessing is upon thy people.