Five books, sealed with five doxologies
The Psalter divides itself into five books, and it marks each seam with a doxology that belongs to the collection rather than to the psalm it closes. Book I ends, “Blessed be Jehovah, the God of Israel, From everlasting and to everlasting. Amen, and Amen.” (41:13). Book II ends the same way and then adds a colophon, “The prayers of David the son of Jesse are ended.” (72:20). Book III closes with “Blessed be Jehovah for evermore. Amen, and Amen.” (89:52), Book IV with “And let all the people say, Amen. Praise ye Jehovah.” (106:48), and Book V with the whole of Psalm 150 standing as the doxology of the entire book. The five-part shape is the load-bearing structural fact about the Psalter, and Jewish tradition has long read it as a Psalter answering to the five books of Moses.
Psalms 41:13 · Psalms 72:19 · Psalms 89:52 · Psalms 106:48 · Psalms 150:6

