וַיָּבֹ֣אוּ מָרָ֔תָה וְלֹ֣א יָֽכְל֗וּ לִשְׁתֹּ֥ת מַ֙יִם֙ מִמָּרָ֔ה כִּ֥י מָרִ֖ים הֵ֑ם עַל־כֵּ֥ן קָרָֽא־שְׁמָ֖הּ מָרָֽה׃
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.
Find Mishnaic references to Exodus 15:23: , passages from the 63 tractates of the Mishnah.