The Book of Psalms is a book of 150 Hebrew poems in the Bible. The Book of Psalms is part of the Hebrew Bible or Tanakh, and it is also in the Old Testament of the Christian translations. People traditionally believe that many of the Psalms in the Bible were written by King David to God. Perhaps the most famous one is Psalm 23, which starts "The LORD is my shepherd". Psalm 23 is often used for funerals.

There are 150 Psalms in the Biblical canon of Jews, Protestants, and Catholics, but there are also more poems that these religions do not think are holy. Psalm 151 is part of canon of the Eastern Orthodox Church.