Numbers 32:20

17 and we -- we are armed hasting before the sons of Israel till that we have brought them in unto their place; and our infants have dwelt in the cities of defence because of the inhabitants of the land;

18 we do not turn back unto our houses till the sons of Israel have inherited each his inheritance,

19 for we do not inherit with them beyond the Jordan and yonder, for our inheritance hath come unto us beyond the Jordan at the [sun]-rising.`

20 And Moses saith unto them, `If ye do this thing: if ye are armed before Jehovah for battle,

21 and every armed one of you hath passed over the Jordan before Jehovah, till his dispossessing His enemies from before Him,

22 and the land hath been subdued before Jehovah -- then afterwards ye do turn back, and have been acquitted by Jehovah, and by Israel; and this land hath been to you for a possession before Jehovah.

23 `And if ye do not so, lo, ye have sinned against Jehovah, and know ye your sin, that it doth find you;