Num 22:1 Then the people of Israel set out and camped in the plains of Moab beyond the Jordan at Jericho. And Balak the son of Zippor saw all that Israel had done to the Amorites. And Moab was in great dread of the people, because they were many. Moab was overcome with fear of the people of Israel. And Moab said to the elders of Midian, “This horde will now lick up all that is around us, as the ox licks up the grass of the field.” So Balak the son of Zippor, who was king of Moab at that time, sent messengers to Balaam the son of Beor at Pethor, which is near the River in the land of the people of Amaw, to call him, saying, “Behold, a people has come out of Egypt. They cover the face of the earth, and they are dwelling opposite me. Come now, curse this people for me, since they are too mighty for me. Perhaps I shall be able to defeat them and drive them from the land, for I know that he whom you bless is blessed, and he whom you curse is cursed.”
Israel was, at this point, on the move. They had basically finished their 38-year exile in the wilderness, and then progressed towards Canaan, coming closer than the previous generation of unbelief. They would remain in this general area (the plains of Moab…across from Jericho) for about a year, when the book of Joshua describes their crossing the Jordan and attack on Jericho.
A man named Balaam suddenly appears in Numbers. We do not know how he came to be regarded as a prophet or a man with spiritual powers, but King Balak certainly knew Balaam’s reputation. As the account continues, it will be clear that Balaam had some knowledge of the true God, the God of Israel, that went beyond a vague spiritual connection (such as the specific mention of the LORD in Numbers 22:8). How Balaam came to know the true God is unclear; he was (in this regard) like Melchizedek (Genesis 14:18) and Jethro (Exodus 18), men who were not Israelites, but they came to some knowledge of the true God. King Balak wanted Balaam to curse Israel, to cripple them spiritually so they could be defeated in battle. Balak seemed to know the strength of Israel was spiritually rooted, and they had to be cut off from their source of power if they were to be conquered. (Guzik)
None had so great a reputation as Balaam; and Balak will employ him, though he send a great way for him. It is not known whether the Lord had ever spoken to Balaam, or by him, before this; though it is probable he had, and it is certain he did afterwards. Yet we have abundant proof that he lived and died a wicked man, an enemy to God and his people. And the curse shall not come upon us if there is not a cause, even though men utter it. To prevail with Balaam, they took the wages of unrighteousness, but God laid restraint upon Balaam, forbidding him to curse Israel. Balaam was no stranger to Israel’s cause; so that he ought to have answered the messengers at once, that he would never curse a people whom God had blessed; but he takes a night’s time to consider what he should do. When we parley with temptations, we are in great danger of being overcome. Balaam was not faithful in returning God’s answer to the messengers. Those are a fair mark for Satan’s temptation, who lessen Divine restraints; as if to go against God’s law were only to go without his leave. The messengers also are not faithful in returning Balaam’s answer to Balak. (Henry)