Reference for Psalms 55:5

לִ֭בִּי יָחִ֣יל בְּקִרְבִּ֑י וְאֵימ֥וֹת מָ֝֗וֶת נָפְל֥וּ עָלָֽי׃

My heart doth writhe within me; and the terrors of death are fallen upon me.