Albert Barnes on Luke 21:22

All things which are written may be fulfilled. Judgment had been threatened by almost all the prophets against that wicked city. They had spoken of its crimes and threatened its ruin. Once God had destroyed Jerusalem and carried the people to Babylon; but their crimes had been repeated when they returned, and God had again threatened their ruin. Particularly was this very destruction foretold by Daniel, Dan 9:26,27. "And after threescore and two weeks shall Messiah be cut off, but not for himself; and the people of the prince that shall come shall destroy the city and the sanctuary; and the end thereof shall be with a flood, and unto the end of the war desolations are determined." Dan 9:26, Dan 9:27.

(t) "all things which" De 28:25,48, Dan 9:26,27, Zech 11:6, 14:1,2