The priest - Not the high priest, but one appointed for the purpose, and called, according to the rabbis, “the anointed of the war”: hence, perhaps the expression of Jeremiah 6:4, etc. “prepare ye” (literally consecrate) “war.” Thus, Phinehas went with the warriors to fight against Midian (Numbers 31:6; compare 1Sa 4:4, 1 Samuel 4:11; 2 Chronicles 13:12).
Related Commentaries of Deuteronomy 20:2
Deuteronomy 20:2
2 And it shall be, when ye are come nigh unto the battle, that the priest shall approach and speak unto the people,