Easton's Bible Dictionary (1897)
” It consisted of five books, viz., Job, Proverbs, and Psalms, and the two books of Chronicles. The ancient Jews classified their sacred books as the Law, the Prophets, and the Kethubim, or Writings. ) In the New Testament (Luke 24:44) we find three corresponding divisions, viz., the Law, the Prophets, and the Psalms.