John Gill Commentary Ezekiel 25:2

"Son of man, set thy face toward the children of Ammon, and prophesy against them:" — Ezekiel 25:2 (ASV)

Son of man, set your face against the Ammonites Who were of the posterity of Lot, implacable enemies of the Jews; who hated their religion, and envied their wealth and happiness; against these the prophet is bid to "set his face"; to look that way where they lived, and to put on a frowning countenance, and a menacing aspect: "strengthen your face", as the Septuagint and Arabic versions render it; look boldly at them.

and prophesy against them ; deliver out the following prophecy concerning them.