הַבִּ֣יטָֽה עֲ֭נֵנִי יְהוָ֣ה אֱלֹהָ֑י הָאִ֥ירָה עֵ֝ינַ֗י פֶּן־אִישַׁ֥ן הַמָּֽוֶת׃
Behold Thou, and answer me, O LORD my God; Lighten mine eyes, lest I sleep the sleep of death;
Read kabbalistic (mystical) interpretation of Psalms 13:4: and classical mystical sources.