Numbers 22:4

To the elders of Midian. But were they not ancient enemies, as it is said, “who attacked Midian in the field of Moav,” when Midian went to war against Moav? Still, because of their fear of Yisroel, they made peace. But why did Moav see fit to accept advice from Midian? When they saw the supernatural victories of Yisroel, they said, “Their leader was raised in Midian. Let us ask them what his character is.” They told them: “He has no power, except with the mouth.” They said, “We, too, will confront them with a man whose power is with his mouth.”

Just as the ox laps up. Whatever an ox laps up is no longer marked by blessing.

At that time. He was unsuited for royalty. He was one of the chieftains of Midian, and when Sichon died, he was appointed over them temporarily.

And they said to the elders of the Midianee, for the people had been one and the kingdom one unto that day: Now will this congregation consume all that is about them, as the ox eateth up the grass of the field. And Balak bar Zippor, a Midianite, was the king of Moab at that time; without (a Midianite) being such at another time; for so was the tradition among them, to have kings from this people and from that, by turns.

THE ELDERS OF MIDIAN. Rabbi Abraham ibn Ezra commented that “it is possible that the five kings of Midian (further, 31:8). It is thus with the five “kings” of Midian [who are here in Verse 4 called “elders”] that Moab took counsel with, but not with the elders of Midian mentioned in Verse 7, who were lords not “kings.” Ramban will refute this interpretation of Ibn Ezra. were the elders.” But if so, [the expression] and the elders of Moab and ‘the elders of Midian’ departed [further on in Verse 7] does not refer to the [same] “elders of Midian” mentioned at the beginning [here in Verse 4: And Moab said unto ‘the elders of Midian’] since kings would not have gone to him [Balaam on such a mission] and [“the elders” mentioned in Verse 7 must perforce have been] princes, as is [expressly] written, [but not “kings”]. Furthermore, according to the opinion of our Rabbis 7. who said [that the reason why Moab turned for assistance to Midian, their traditional enemy, was because they said]: “The leader of these people [the Israelites] grew up in Midian; [let us ask them about his characteristics]” — it would have been fitting for the Moabites to send [the delegation] to the elders of Midian, not to the kings or the people, for it was the elders who would know Moses’ nature.
It appears to me that originally there were kings in Midian, but Sihon the king of the Amorites had fought against the former king of Moab, and taken all his land out of his hand, even unto the Arnon. He [also] fought against the children of Ammon and took [part] of their land, just as the Ammonite king said to Jephthah, Because Israel took away my land, when he came up out of Egypt, and Jephthah replied to him that they had taken it from Sihon., Verses 15-23. In [the Book of] Joshua it is [also] written, And their border was Jazer, and all the cities of Gilead, and half the land of the children of Ammon, unto Aroer; and Sihon furthermore fought against the kings of Midian and conquered their land, and made them his servants bringing tribute and took the crowns off their heads, depriving them of the splendor of royalty, and he allowed them to remain as judges of the land of Midian under his authority. Therefore [although as Ibn Ezra says, they were indeed once kings of Midian], they are called ‘the elders’ of Midian, similar in expression to [she shall go up] to the gate unto ‘the elders’ [which means …

ילחכו, all the existing crops and any other available foodstuffs.

עתה, now that the Israelites had conquered both Sichon and Og and their respective countries.

ילחכו הקהל את כל סביבותינו, they wanted their leaders to enlarge the area under their control in order to make their borders more secure.

ובלק בן צפור, who was known as a hero and a military expert.

מלך למואב בעת ההיא, in spite of these factors which should have encouraged the Moabites they did not have the heart to fight the Israelites as is clear from Judges 11,25. As to the remarks by Joshua that Balak son of Tzippor arose and fought Israel (Joshua 24,9), Joshua said this in reference to Balak hiring Bileam to curse the people of Israel as he himself pointed out in the same verse.

ועתה ילחכו הקהל את כל סביבותינו, “and now this horde of people and livestock will lick up every blade of grass in our vicinity.” They were not worried about their lives, apparently knowing that G–d had forbidden the Israelites to make war upon them, but they faced economic ruin nonetheless. (They must have known about what G–d had said in Deuteronomy 2,9 about not harassing Moav.)

כלחוך השור, “just like oxen lick up;” oxen are known not to have teeth in the upper parts of their gums, so that instead of chewing the grass they rub it in their mouths, unlike horses or donkeys. As a result also the roots of the grass are destroyed and will not grow again.