והמים להם חמה מימינם ומשמאלם
Actually, the Red Sea was divided into twelve parts, allowing each tribe to walk though separately. The Sfas Emes explains that Hashem did this to teach them that each individual tribe has its own singular mission and, thus, deserves the miracle of the Splitting of the Red Sea for its own sake. In Sefer Tehillim 136:13, David Hamelech records the miracle, L’Gozeir Yam Suf ligzarim, “Who splits/divides the Red Sea into parts.” Surprisingly, the pasuk is written in the present tense, as if Hashem continually splits the Red Sea. (Veritably, the commentators translate it in the past tense, but l’gozeir…