Or HaChaim on Numbers 22:35/אור החיים על במדבר כ״ב:ל״ה

1 ויאמר מלאך…לך עם האנשים, The angel said: "go with the men, etc." Why did the angel say: "with the men?" Our sages in Bamidbar Rabbah 20,15 say that the angel told him that the die had been cast, that from now on Bileam belonged to the same team as these men, and that ultimately he would be deprived of any future in the world to come. I believe that this is pure homiletics; we need to understand the plain meaning of the angel's words. We need to understand further why the angel did not tell Bileam to go home as the latter had offered to do and as we would have expected. However, the angel wanted to explain to Bileam the reason he agreed that Bileam continue to travel with the emissaries. It all had to do with what these emissaries would think if Bileam suddenly went home. They would conclude that G'd was afraid of what Bileam would be able to do once he was in Moav and that on that account G'd had forbidden him to come along. Allowing the emissaries of Balak to arrive at such a conclusion would be a desecration of the name of G'd, i.e. would lower G'd's image in their estimation as I have already explained on the words הולך הוא. Perhaps the angel's instructions have to be understood thus: "go with them and do not isolate yourself in solitude." In this way Bileam would not have an opportunity to prepare himself to contravene G'd's instructions by consulting his charms. Bileam complied, as we know from the words וילך בלעם עם שרי בלק, "Bileam went together with the ministers of Balak."

2ואפס את הדבר…אותו תדבר. "However, the word which I put in your mouth, it you shall utter!" Here the angel made a new condition, something that G'd had not told Bileam outright in his dream. When G'd had spoken to Bileam previously (verse 20) He had said: "the word I shall tell you that is what you shall do!" G'd's wording at that time had allowed Bileam to plot how to get around what G'd had obviously had in mind. His own strength lay both in deed and in speech. The deeds would be the practice of magic. He also exercised his power by means of his evil eye. Zohar volume 3 page 202 draws attention to this in connection with 24,2: "Bileam raised his eyes and saw Israel, etc." This is a hint that Bileam tried to employ his evil eye against the Jewish people at that moment but that G'd covered the Israelites with His protective "shadow" so that Bileam could no longer see them. When the Torah said in 24,2 ותהי עליו רוח השם, the subject is the Jewish people, not Bileam. G'd protected Israel against the evil eye (Zohar volume 3, page 211.) The power Bileam exercised by mouth was his ability to curse. When G'd had said to him during the night: "it you shall do," He had meant to forbid him also to speak against the Jewish people if such words as he would say would result in deeds. Bileam had not understood this correctly as his mind was bent on finding a loophole in G'd's instructions. This is why at this point the angel told him unmistakably that he must not even utter a word against the Jewish people. This included the giving of advice designed to harm the Jewish people. Bileam did not comply with this part of the warning. Bamidbar Rabbah 20,18 writes on 23,5 "The Lord put a word in Bileam's mouth," that G'd placed an iron bar in Bileam's mouth and that every time Bileam tried to utter something evil the bar threatened to choke him. In this way G'd frustrated Bileam's evil intent. We also know that Bileam gave the advice to Balak which eventually caused the death of 24.000 Israelite males. He even endeavoured to violate G'd's instructions by putting his evil eye on the people until G'd intervened. All of these things combined provided sufficient excuse for the Israelites to kill Bileam by the sword in the course of their punitive expedition against Midian. According to Sanhedrin 97 Gentiles are culpable both for sins committed by deed and for sins committed by word of mouth. Bileam had been warned by G'd on both counts so that he only received his due when the Israelites killed him.