וַיְשַׁלַּ֖ח אֶת־הָֽעֹרֵ֑ב וַיֵּצֵ֤א יָצוֹא֙ וָשׁ֔וֹב עַד־יְבֹ֥שֶׁת הַמַּ֖יִם מֵעַ֥ל הָאָֽרֶץ׃
And he sent forth a raven, and it went forth to and fro, until the waters were dried up from off the earth.
Read kabbalistic (mystical) interpretation of Genesis 8:7: and classical mystical sources.