Numbers 3:23 Kabbalah

מִשְׁפְּחֹ֖ת הַגֵּרְשֻׁנִּ֑י אַחֲרֵ֧י הַמִּשְׁכָּ֛ן יַחֲנ֖וּ יָֽמָּה׃

The families of the Gershonites were to pitch behind the tabernacle westward;

Read kabbalistic (mystical) interpretation of Numbers 3:23: and classical mystical sources.