Jeremiah 46:21
Also her hired men are in the midst of her like fatted bullocks; for they also are turned back, and are fled away together: they did not stand, because the day of their calamity was come upon them, and the time of their visitation.
Cross-reference
In verse 5, the same scene of warriors fleeing in dismay reinforces the mercenaries' panic.
In verse 15, the mighty ones also cannot stand because the Lord thrusts them down, echoing the mercenaries' failure.
In Jeremiah 46:16, the hired soldiers urge each other to flee back to their homelands – explaining why they turn back in v21.
Jeremiah 50:27 uses nearly identical phrasing — 'their day has come, the time of their punishment' — and bull imagery, echoing the judgment on Egypt in v21.
Ezekiel 30:4-6 describes judgment on Egypt and its allies — including the foreign nations that were hired mercenaries in Jer 46:21.
In Deuteronomy 32:15, Israel 'grew fat' and rebelled; here, fatted mercenaries face slaughter, both using fatness as judgment imagery.