en_tn/deu/33/21.md

General Information:

Moses continues to bless the tribes of Israel; the blessings are short poems. He continues to describe the tribe of Gad as one man, which he began to do in Deuteronomy 33:20. (See: rc://en/ta/man/translate/figs-parallelism)

the leader's portion

This means a larger piece of land that a leader normally took.

He came with the heads of the people

"They met with all the leaders of the Israelites"

He carried out the justice of Yahweh and his decrees with Israel

"They obeyed all that Yahweh had commanded the Israelites"