R. Yehudah b. Ilai says: Idolatry crossed the sea with Israel and Moses removed (it) at that time, viz." "And Moses 'removed' from Israel of the Red Sea" — from the "thing" that was with Israel in (their crossing of) the Red Sea. Which was that? Idolatry, viz. (Zechariah 10:11) "And tzarah (a "rival," i.e., idolatry) passed through the red Sea." Thus, "And Moses 'removed' from Israel … of the Red Sea."