John Calvin Commentary Ezekiel 7:9

"And mine eye shall not spare, neither will I have pity: I will bring upon thee according to thy ways; and thine abominations shall be in the midst of thee; and ye shall know that I, Jehovah, do smite." — Ezekiel 7:9 (ASV)

This verse contains nothing besides a repetition, except that finally the Prophet more clearly points out what that knowledge was which he previously mentioned: namely, that they would unwillingly feel God’s power because they had withdrawn their confidence from the Prophet’s teaching. For he had said two or three times, You shall know that I am Jehovah; now he adds the participle, and that it is I who smite you.

This, then, is the knowledge by which God makes himself known to the reprobate, while they are compelled, whether they want to or not, to feel that there is a judge of the world. The faithful indeed profit under God’s chastisements, and they are sometimes humbled under his hand because they do not willingly obey his word. But we said that the Prophet here triumphs over the people’s pride, who dared to deride all threats as if God were sleeping in heaven. He says, therefore, finally, that when God strikes them, they will feel what they did not believe.