Albert Barnes Commentary Ezekiel 1:3

"the word of Jehovah came expressly unto Ezekiel the priest, the son of Buzi, in the land of the Chaldeans by the river Chebar; and the hand of Jehovah was there upon him." — Ezekiel 1:3 (ASV)

Came expressly - The phrase marks that it was in truth a heaven-sent vision.

The hand of the Lord - A phrase in all prophecy implying a constraining power, because the spirit constrains the prophet independently of his own will.