Seventy-three psalms are inscribed with David's name, twelve with that of Asaph the singer; eleven go under the name of the Sons of Korah, a family of singers; one (i.e. Ps. xc.) is attributed to Mosses. The whole compilation is divided into five books: bk. 1, from i. to xli.; bk. 2, from xlii. to lxxii.; bk. 3, from lxxiii. to lxxxix.; bk. 4, from xc. to cvi.; bk. 5, from cvii. to cl.