Psalm 13

Psalm 13
"How long, O Lord"
Psalm 13 in the Très Riches Heures du Duc de Berry
Other name	Psalm 12 (Vulgate) "Usquequo Domine"
Language	Hebrew (original)

Psalm 13 is the 13th psalm of the Book of Psalms, beginning in English in the King James Version (KJV): "How long, O Lord". The Book of Psalms is part of the third section of the Hebrew Bible,^[1] and a book of the Christian Old Testament. In the Greek Septuagint and the Latin Vulgate, this psalm is Psalm 12 in a slightly different numbering system. In Latin, it is known as "Usquequo Domine".^[2]

The psalm forms a regular part of Jewish, Catholic, Lutheran, Anglican and other Protestant liturgies.