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 unto the sons of Israel, according unto all that the LORD had commanded him regarding them;

4 after he had slain Sihon, the king of the Amorites, who dwelt in Heshbon, and Og, the king of Bashan, who dwelt at Astaroth in Edrei;

5 on this side of the Jordan, in the land of Moab, Moses resolved to declare this law, saying,