Exodus 15:22-24

Young's Literal Translation

²² And Moses causeth Israel to journey from the Red Sea, and they go out unto the wilderness of Shur, and they go three days in the wilderness, and have not found water,

²³ and they come in to Marah, and have not been able to drink the waters of Marah, for they [are] bitter; therefore hath [one] called its name Marah.

²⁴ And the people murmur against Moses, saying, `What do we drink?'