en_tn/1sa/13/13.md

Saul told Samuel why he had acted wrongfully as priest and given the offering.

You have not kept the command of Yahweh

Saul was to wait for Samuel to come and sacrifice the burn offering to God. Not perform the sacrifice himself.

established your rule

"set up your rule" or "authorized your rule" or "appointed your rule"

a man after his own heart

This phrase means "will follow his command," it uses "heart" to represent the desire or will of Yahweh. (See: rc://en/ta/man/translate/figs-metaphor and rc://en/ta/man/translate/figs-synecdoche)