Son of man, put forth a riddle - Riddle, Anglo-Saxon, from to divine; a thing that must be curiously investigated and sifted, to find out the meaning; and hence, riddle, a sort of coarse sieve to clean corn, to separate coarse chaff and straws from the pure grain. An instrument formerly used for divination. This is not far removed from the Hebrew חידה chidah, from חד chad, to penetrate; not that which penetrates the mind, but which we must penetrate to find out the sense.

Son of man, put forth a riddle,.... A dark saying, but a smart one: "whet a whetting" (k), as in the Hebrew; something at first sight difficult to be understood, yet amusing and entertaining; and, when solved, very useful and instructive:
and speak a parable unto the house of Israel; or, "concerning the house of Israel" (l); as the Targum and Syriac version; something relating to them, and what would aptly describe and represent their case; for the prophet was bid to take such a method, not to hide things from them, but rather the more strongly to represent them to them; seeing hereby their attention would be excited, and things would be more fixed in their memories, and they would be put upon studying the meaning of them; and when explained to them, and understood, which was quickly done, they might be the more affected with them.
(k) , Hebrews. "acue acumen", Piscator. (l) "de domo Israelis", Junius & Tremellius, Polanus.

PARABLE OF THE TWO GREAT EAGLES, AND THE CROPPING OF THE CEDAR OF LEBANON. JUDAH IS TO BE JUDGED FOR REVOLTING FROM BABYLON, WHICH HAD SET UP ZEDEKIAH INSTEAD OF JEHOIACHIN, TO EGYPT; GOD HIMSELF, AS THE RIVAL OF THE BABYLONIAN KING, IS TO PLANT THE GOSPEL CEDAR OF MESSIAH. (Ezekiel. 17:1-24)
riddle--a continued allegory, expressed enigmatically, requiring more than common acumen and serious thought. The Hebrew is derived from a root, "sharp," that is, calculated to stimulate attention and whet the intellect. Distinct from "fable," in that it teaches not fiction, but fact. Not like the ordinary riddle, designed to puzzle, but to instruct. The "riddle" is here identical with the "parable," only that the former refers to the obscurity, the latter to the likeness of the figure to the thing compared.

A riddle - A dark saying. The house of Israel - The remainders of the house of Israel, whether of the ten, or of the two tribes.