Parallel
Exodus 15:23
Clementine Vulgate · Berean Standard Bible
Et venerunt in Mara, nec poterant bibere aquas de Mara, eo quod essent amaræ : unde et congruum loco nomen imposuit, vocans illum Mara, id est, amaritudinem.
And when they came to Marah (note: Marah means bitter.), they could not drink the water there because it was bitter. (That is why it was named Marah.)