Deuteronomy 11:6-9
6 and what he did to Dathan and Abiram, sons of Eliab the Reubenite, when the earth opened its mouth right in the middle of all Israel and swallowed them up with their households, their tents and every living thing that belonged to them.
7 But it was your own eyes that saw all these great things the Lord has done.
8 Observe therefore all the commands I am giving you today, so that you may have the strength to go in and take over the land that you are crossing the Jordan to possess,
9 and so that you may live long in the land that the Lord swore to your forefathers to give to them and their descendants, a land flowing with milk and honey.