תָּֽשֶׁת־חֹ֭שֶׁךְ וִ֣יהִי לָ֑יְלָה בּֽוֹ־תִ֝רְמֹ֗שׂ כָּל־חַיְתוֹ־יָֽעַר׃
Thou makest darkness, and it is night, Wherein all the beasts of the forest do creep forth.
Read kabbalistic (mystical) interpretation of Psalms 104:20: and classical mystical sources.