The Book of Psalms is divided into five sections, each closing with a doxology (i.e., a benediction)—these divisions were probably introduced by the final editors to imitate the five-fold division of the Pentateuch.
Book 1 (Psalms 1–41)
Book 2 (Psalms 42–72)
Book 3 (Psalms 73–89)
Book 4 (Psalms 90–106)
Book 5 (Psalms 107–150)
