John Gill Commentary Ezekiel 21:25

"And thou, O deadly wounded wicked one, the prince of Israel, whose day is come, in the time of the iniquity of the end," — Ezekiel 21:25 (ASV)

And thou, profane wicked prince of Israel
Meaning Zedekiah, the then reigning prince; who is so called, because he had profaned or violated the oath and covenant he made with the king of Babylon, as well as because of other sins he was guilty of; and his being a prince of Israel was an aggravation of his crimes: now, though it is "not fit" in common, or for ordinary persons, "to say to a king thou art wicked, and to princes ye are ungodly", (Job 34:18) , yet a prophet from the Lord, and in his name, may say so; and he ought, when he has a commission from God for it: whose day is come ;
the time of his downfall and ruin; and so the Targum,

``whose day of destruction is come:'' when iniquity shall have an end; a stop put to the torrent of it, both in the king and his subjects; they not having the opportunity and means of sinning in captivity as before; or when the measure of iniquity is filled up, then comes punishment; or when the punishment of iniquity shall be completed. So the Targum, ``the time of the recompence of his sins.''