וַיָּ֥שֶׁת חֹ֛שֶׁךְ סְבִיבֹתָ֖יו סֻכּ֑וֹת חַֽשְׁרַת־מַ֖יִם עָבֵ֥י שְׁחָקִֽים׃
And He made darkness pavilions round about Him, gathering of waters, thick clouds of the skies.
Read kabbalistic (mystical) interpretation of II Samuel 22:12: and classical mystical sources.