שִׁוִּ֤יתִי עַד־בֹּ֙קֶר֙ כָּֽאֲרִ֔י כֵּ֥ן יְשַׁבֵּ֖ר כָּל־עַצְמוֹתָ֑י מִיּ֥וֹם עַד־לַ֖יְלָה תַּשְׁלִימֵֽנִי׃
The more I make myself like unto a lion until morning, the more it breaketh all my bones; from day even to night wilt Thou make an end of me.
Read kabbalistic (mystical) interpretation of Isaiah 38:13: and classical mystical sources.