and every one of your armed men crosses the Jordan before Yahweh, until he has driven out his enemies before him,
In context
19for we will not receive an inheritance with them on the other side of the Jordan, since our inheritance has come to us on this side of the Jordan, to the east.” 20Moses said to them, “If you do this — if you arm yourselves before Yahweh for war, 21and every one of your armed men crosses the Jordan before Yahweh, until he has driven out his enemies before him, 22and the land is subdued before Yahweh — then you may return, and you will be free of obligation before Yahweh and before Israel, and this land will be your possession before Yahweh. 23But if you do not do this, you will have sinned against Yahweh, and be sure your sin will find you out.