Abū ‘Abdillāh (Imam Sādiq (a.s.)) asked, “O Ya’qūb! Have you ever seen an owl during the day?” I replied, “No.” Imam (a.s.) asked, “Do you know why that is?” I replied, “No.” Imam (a.s.) said, “It is because during the day, owls abstain from eating that with which Allāh has sustained them. At night, after breaking their fast with their sustenance, they keep chanting with grief over Ḥusain ibn ‘Ali (a.s.) until morning.”