en_tn/2ch/18/18.md

on his right hand and on his left

This means that they were standing beside him on his left side and his right side. Alternate translation: "by his right side and by his left side" (See: rc://en/ta/man/translate/figs-idiom)

on his left

This implies his left hand. Alternate translation: "on his left hand" (See: rc://en/ta/man/translate/figs-explicit)