By the harvest is denoted the day of judgment, in which the good are to be separated from the evil; which will be done by the ministry of Angels, as it is said below, that the Son of Man shall come to judgment with His Angels.
“As then the tares are gathered and burned in the fire, so shall it be in the end of this world. The Son of man shall send forth his Angels, and they shall gather out of his kingdom all offences, and them which do iniquity.”
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).