Why will they gather the pieces inside it?
Rashi: Amidst fear of the siege, all the leaders and officers gathered in it.
Radak: The pieces that it is proper to put them inside, I will gather them in it. This is a Mashal for those who gathered to Yerushalayim from the cities that were destroyed, and they were in Yerushalayim during the siege.
Malbim: He will gather the bones, so they will be in the pot and in the water; parts should not come out above the pot lest the fire burn them. All will be in the wall, and not leave.
Why does it mention every nice piece?
Radak: This is a Mashal for the officers of Yehudah [Malbim - and Chachamim].
Why does it specify the thigh and the shoulder?
Radak: These are good pieces, full of meat.
What is "Mivchar Atzamim Malei"?
Radak: He filled the pot also from other choice pieces. They are called Atzamim, because they are dissected based on the bones.
Malbim: These are the soldiers.
