The Book of PsalmsPsalm 53
Deus, in nomine tuo. A prayer for help in distress.
The Douay-Rheims numbers the Psalms as the Latin Vulgate does. In Bibles translated from the Hebrew this is Psalm 54. Read Psalm 54 in the WEBC.

53Unto the end, In verses, understanding for David.
2When the men of Ziph had come and said to Saul: Is not David hidden with us?
3Save me, O God, by thy name, and judge me in thy strength.
4O God, hear my prayer: give ear to the words of my mouth.
5For strangers have risen up against me; and the mighty have sought after my soul: and they have not set God before their eyes.
6For behold God is my helper: and the Lord is the protector of my soul.
7Turn back the evils upon my enemies; and cut them off in thy truth.
8I will freely sacrifice to thee, and will give praise, O God, to thy name: because it is good:
9For thou hast delivered me out of all trouble: and my eye hath looked down upon my enemies.