The Book of PsalmsPsalm 42
Judica me, Deus. The prophet aspireth after the temple and altar of God.
The Douay-Rheims numbers the Psalms as the Latin Vulgate does. In Bibles translated from the Hebrew this is Psalm 43. Read Psalm 43 in the WEBC.

42A psalm for David. Judge me, O God, and distinguish my cause from the nation that is not holy: deliver me from the unjust and deceitful man.
2For thou art God my strength: why hast thou cast me off? and why do I go sorrowful whilst the enemy afflicteth me?
3Send forth thy light and thy truth: they have conducted me, and brought me unto thy holy hill, and into thy tabernacles.
4And I will go in to the altar of God: to God who giveth joy to my youth.
5To thee, O God my God, I will give praise upon the harp: why art thou sad, O my soul? and why dost thou disquiet me?
6Hope in God, for I will still give praise to him: the salvation of my countenance, and my God.