מִ֭דֶּבֶר בָּאֹ֣פֶל יַהֲלֹ֑ךְ מִ֝קֶּ֗טֶב יָשׁ֥וּד צָהֳרָֽיִם׃
Of the pestilence that walketh in darkness, Nor of the destruction that wasteth at noonday.
Rashi on Psalms
Pestilence, etc., destruction These are names of demons; one destroys at night, and one destroys at noon.