Charles Ellicott Commentary Luke 24:44

"And he said unto them, These are my words which I spake unto you, while I was yet with you, that all things must needs be fulfilled, which are written in the law of Moses, and the prophets, and the psalms, concerning me." — Luke 24:44 (ASV)

These are the words which I spake unto you.—As with the travellers to Emmaus, so now with the Ten who were present, our Lord leads His disciples to the true method of interpreting the prophecies which foretold the Christ. And that method was not an afterthought. It had been given in hints and outlines before; now they were led to see it in its fullness.

The threefold division of the Law, the Prophets (including most of the historic books), and the Psalms (the latter term standing for the whole of the Kethubim, the Hagiographa or “holy writings,” of which the Psalms were the most conspicuous portion), corresponded to that which was in common use among the Jews. (See General Introduction I.—The Books of the New Testament.)