Kabbalah zu Bereschit 11:9

There are five groups in the mixed multitude. These are the Nefilim (fallen), the Giborim (mighty), the Anakim (giants), the Refaim (shades) and the Amalekites. Because of them, the small Hei fell from its place (Binah). Bilaam and Balak come from the side of Amalek, because if you remove the letters Am from Bilaam and the letters Lak from Balak, you are left with Babylon (Heb. Bavel). "Therefore is the name of it called Babylon; because Hashem did there confound (Heb. balal) the language of all the earth" (Beresheet 11:9).