Exodus 15:23 Cross References - Geneva

²³ And whe they came to Marah, they could not drinke of the waters of Marah, for they were bitter: therefore the name of the place was called Marah.

⁸ And they departed from before Hahiroth, and went through the middes of the Sea into the wildernesse, and went three dayes iourney in the wildernesse of Etham, and pitched in Marah.

²⁰ And she answered them, Call me not Naomi, but call me Mara: for the Almightie hath giuen me much bitternes.