en_tn_lite_do_not_use/1sa/14/20.md

the people who were with him

the remnant of the Israelite army that remained with Saul

Every Philistine's sword was against his fellow countrymen

The swords are spoken of as if they were living people. Alternate translation: "The Philistine soldiers were striking each other with their swords" (See: rc://en/ta/man/translate/figs-personification)