Exodus 40:30 Kabbalah

וַיָּ֙שֶׂם֙ אֶת־הַכִּיֹּ֔ר בֵּֽין־אֹ֥הֶל מוֹעֵ֖ד וּבֵ֣ין הַמִּזְבֵּ֑חַ וַיִּתֵּ֥ן שָׁ֛מָּה מַ֖יִם לְרָחְצָֽה׃

And he set the laver between the tent of meeting and the altar, and put water therein, wherewith to wash;

Read kabbalistic (mystical) interpretation of Exodus 40:30: and classical mystical sources.