22 then when the land is subdued before the LORD, you may return and be free from your obligation to the LORD and to Israel. And this land will be your possession before the LORD.

Read Numbers 32:22 Using Other Translations

And the land be subdued before the LORD: then afterward ye shall return, and be guiltless before the LORD, and before Israel; and this land shall be your possession before the LORD.
and the land is subdued before the LORD; then after that you shall return and be free of obligation to the LORD and to Israel, and this land shall be your possession before the LORD.
then you may return when the LORD has conquered the land. You will have fulfilled your duty to the LORD and to the rest of the people of Israel. And the land on the east side of the Jordan will be your property from the LORD .