Joshua 12:6

Them did Moses the servant of the Lord and the children of Israel smite: and Moses the servant of the Lord gave it for a possession unto the Reubenites, and the Gadites, and the half tribe of Manasseh.

Cross-references

Joshua 13:8-32 provides the detailed allotment to Reuben, Gad, and half-Manasseh, which Moses gave as stated here.

Numbers 21:24-35 records the actual conquest of Sihon and Og that Moses led, which this verse summarizes.

Numbers 32:33 records Moses granting the same territories to these tribes, directly parallel to this verse.