en_tn_lite_do_not_use/deu/15/04.md

the land that he gives

This refers to the land of Canaan.

if only you diligently listen to the voice of Yahweh your God

AT: “if only you are careful to obey what Yahweh your God says” (See: rc://en/ta/man/translate/figs-metonymy)

you will rule over many nations, but they will not rule over you

This means basically the same thing as the first part of the sentence. It emphasizes that the people of Israel will be financially superior to the other nations. (See: rc://en/ta/man/translate/figs-parallelism)