Psalms

The Book of Psalms commonly referred to simply as Psalms, the Psalter or “the Psalms”, is the first book of the Ketuvim (“Writings”), the third section of the Hebrew Bible, and thus a book of the Christian Old Testament. The title is derived from the Greek translation, ψαλμοί, psalmoi, meaning “instrumental music” and, by extension, “the words accompanying the music”. The book is an anthology of individual psalms, with 150 in the Jewish and Western Christian tradition and more in the Eastern Christian churches. Many are linked to the name of David, but his authorship is not accepted by modern scholars.

More on Wikipedia