וַיִּסְע֖וּ מִיַּם־ס֑וּף וַֽיַּחֲנ֖וּ בְּמִדְבַּר־סִֽין׃
And they journeyed from the Red Sea, and pitched in the wilderness of Sin.
Read Kabbalistic (mystical) interpretations of Numbers 33:11: Zohar and classical Jewish mystical sources, free online.