en_tn/num/03/51.md

the redemption money

This refers to the money that Moses collected.

to his sons

Here "his" refers to Aaron

he was told to do by Yahweh's word, as Yahweh had commanded him

These two phrases mean basically the same thing and are combined for emphasis. (See: rc://en/ta/man/translate/figs-parallelism)

he was told to do by Yahweh's word

Here "Yahweh's word" refers to Yahweh who spoke to Moses. This can be stated in active form. Alternate translation: "that Yahweh had told him to do" (See: rc://en/ta/man/translate/figs-activepassive and rc://en/ta/man/translate/figs-metonymy)