Deuteronomy 1:3-5

3 And it came to pass in the fortieth year, in the eleventh month, on the first day of the month, that Moses spoke to the children of Israel, according to all that the LORD had given him in commandment to them;

4 After he had slain Sihon the king of the Amorites, which dwelled in Heshbon, and Og the king of Bashan, which dwelled at Astaroth in Edrei:

5 On this side Jordan, in the land of Moab, began Moses to declare this law, saying,