Ezekiel 3:4 is God's original command to speak His words to Israel — here Ezekiel fulfills it by reporting the vision.

In Ezekiel 3:17, God appoints Ezekiel as a watchman to deliver warnings — here he fulfills that role by speaking the vision.

Ezekiel 3:27 describes God opening Ezekiel's mouth to speak — in this verse, he speaks the vision as God enabled.

Ezekiel 3:11 commands Ezekiel to speak to the exiles — here he does exactly that, reporting the vision to them.