Deuteronomy 2:31

And the Lord said to me, See, from now on I have given Sihon and his land into your hands: go forward now to take his land and make it yours.

Deuteronomy 1:8

See, all the land is before you: go in and take for yourselves the land which the Lord gave by an oath to your fathers, Abraham, Isaac, and Jacob, and to their seed after them.

Deuteronomy 2:24

Get up now, and go on your journey, crossing over the valley of the Arnon: see, I have given into your hands Sihon, the Amorite, king of Heshbon, and all his land: go forward to make it yours, and make war on him,

Treasury of Scripture Knowledge

Summary

And the LORD said unto me, Behold, I have begun to give Sihon and his land before thee: begin to possess, that thou mayest inherit his land.

Bible References

Give sihon

Deuteronomy 2:24
Get up now, and go on your journey, crossing over the valley of the Arnon: see, I have given into your hands Sihon, the Amorite, king of Heshbon, and all his land: go forward to make it yours, and make war on him,
Deuteronomy 1:8
See, all the land is before you: go in and take for yourselves the land which the Lord gave by an oath to your fathers, Abraham, Isaac, and Jacob, and to their seed after them.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain