In Ezekiel 4:7, among God’s instructions to the prophet to act out the punishment of Jerusalem by lying on his left side and then his right, he is told:
And you shall set your face toward the siege of Jerusalem, with your arm bared (זְרֹעֲךָ֖ חֲשׂוּפָ֑ה), and you shall prophesy against the city. (ESV)
I’m wondering about the meaning of this phrase - possibly idiomatic - or maybe just symbolic within the enactment prophecy? The only other place I’m finding these words collocated is in Isaiah 52:10 (conveniently cross-referenced in the ESV):
The LORD has bared his holy arm (חָשַׂ֤ף... אֶת־זְר֣וֹעַ)....and all the ends of the earth shall see the salvation of our God. (ESV)
The meaning in Isaiah is apparent (LXX: ἀποκαλύψει...τὸν βραχίονα), but it seems very different from Ezekiel. (The Greek there: τὸν βραχίονά σου στερεώσεις - you will strengthen your arm - but I’m not sure what that means either.)
What is the significance of this phrase in Ezekiel?