וַיִּסְעוּ֙ מִפְּנֵ֣י הַֽחִירֹ֔ת וַיַּֽעַבְר֥וּ בְתוֹךְ־הַיָּ֖ם הַמִּדְבָּ֑רָה וַיֵּ֨לְכ֜וּ דֶּ֣רֶךְ שְׁלֹ֤שֶׁת יָמִים֙ בְּמִדְבַּ֣ר אֵתָ֔ם וַֽיַּחֲנ֖וּ בְּמָרָֽה׃
And they journeyed from Penehahiroth, and passed through the midst of the sea into the wilderness; and they went three days’journey in the wilderness of Etham, and pitched in Marah.
Read Kabbalistic (mystical) interpretations of Numbers 33:8: Zohar and classical Jewish mystical sources, free online.