And Nasr ibn Ali al-Jahdami narrated to us, my father narrated to me, Layth ibn Sa'd narrated to us with this chain of transmission, a similar report, except that he said: "For in the year there is a day in which a plague descends." And he added at the end of the hadith: Layth said: "The non-Arabs among us guard against that in the month of Kanun al-Awwal (December)."