en_tn/gen/49/08.md

your brothers will praise you ... Your father's sons will bow down before you

These two statements mean the same thing. (See: rc://en/ta/man/translate/figs-parallelism)

will praise you. Your hand

The second sentence states the reason for the first sentence. This can be made clear with "for" or "because." Alternate translation: "will praise you. For your hand" or "will praise you because your hand" (See: rc://en/ta/man/translate/writing-connectingwords)

Your hand will be on the neck of your enemies

This is a way of saying "You will conquer your enemies." (See: rc://en/ta/man/translate/figs-idiom)

bow down

This means to bend over to humbly express respect and honor toward someone. (See: rc://en/ta/man/translate/translate-symaction)