C. F. Keil and Franz Delitzsch on 2 Chronicles 32:21

2Ch 32:21

The deliverance: cf. 2Ki 19:35.; Isa 37:36. The number of Assyrians smitten by the angel of the Lord is not stated, as it was not of importance, the main fact being that the whole Assyrian host was annihilated, so that Sennacherib had to return with disgrace into his own land. This is what is signified by the rhetorical phrase: The angel of Jahve destroyed all the valiant warriors, and the leaders and princes of the king of Assyria, and he returned with shame of face (cf. Ezr 9:7; Psa 44:16) to his land, where his sons slew him in the temple. In regard to the facts, see on 2Ki 19:37 and Isa 37:38. The Keth. מיציאו is an orthographical error for מיציאי, a contraction of מן and יציאי from יציא, a passive formation with intransitive signification: some of those who went forth from his own bowels, i.e., some of his sons; cf. the similar formation miyliydeey, 1Ch 20:4.