Numbers 22:2-4

2Now Balak son of Zippor saw all that Israel had done to the Amorites,

3and Moab was terrified because there were so many people. Indeed, Moab was filled with dread because of the Israelites.

4The Moabites said to the elders of Midian, “This horde is going to lick up everything around us, as an ox licks up the grass of the field.” So Balak son of Zippor, who was king of Moab at that time,