Exodus 15:23

King James Version (Oxford) 1769

And when they came to Marah, they could not drink of the waters of Marah, for they were bitter: therefore the name of it was called Marah.

Cross References

Ruth 1:20

And she said unto them, Call me not Naomi, call me Mara: for the Almighty hath dealt very bitterly with me.

Numbers 33:8

And they departed from before Pi-hahiroth, and passed through the midst of the sea into the wilderness, and went three days' journey in the wilderness of Etham, and pitched in Marah.