Balaam (Hebrew: בִּלְעָם, Bilʻam Bilʻām, English pronunciation /ˈbeɪlæm/ ) is a diviner in the Torah, his story occurring towards the end of the Book of Numbers (Hebrew: במדבר). The etymology of his name is uncertain, and discussed below. Every ancient reference to Balaam considers him a non-Israelite, a prophet, and the son of Beor, though Beor is not so clearly identified. Though other sources describe the apparently positive blessings he delivers upon the Israelites, he is reviled as a "wicked man" in the major story concerning him. Balaam refused to speak what God didn't speak and would not curse the Israelites, even though King Balak of Moab offered him money to do so. (Numbers 22-24). But Balaam's error and the source of his wickedness came from sabotaging the Israelites as they entered the Promised Land. According to Numbers 31:16 and St. John (Revelation 2:14), Balaam returned to King Balak and informed the king on how to get the Israelites to curse themselves by enticing them with prostitutes and unclean food sacrificed to idols. The Israelites fell into transgression due to these traps and YHWH sent a deadly plague to them as a result (Numbers 31:16).
Read more about Balaam: Balaam and Balak, Prophesies, Balaam in Rabbinic Literature, Balaam in The New Testament, Josephus & Philo, Balaam in The Quran, Etymology, Balaam and The Deir Alla Inscription