Kaab said, "If this verse had been revealed to any community other than this one, they would have marked the day it came down to them and made it a festival on which they gathered together."Umar asked, "Which verse, Kaab?"Kaab replied, "'Today I have perfected your religion for you' [Maidah 5:3]."Umar said, "I know the day it was revealed and the place where it was revealed. It was a Friday and the day of Arafah, and praise be to Allah, both of them are a festival for us."
لو أن غير هذه الأمة نزلت عليهم هذه الآية، لنظروا اليوم الذي أنزلت فيه عليهم فاتخذوه عيدا يجتمعون فيه. فقال عمر: أي آية يا كعب؟ فقال: {اليوم أكملت لكم دينكم} فقال عمر: قد علمت اليوم الذي أنزلت فيه، والمكان الذي أنزلت فيه، يوم جمعة ويوم عرفة. وكلاهما بحمد الله لنا عيد.
No references are available.
Tabarani narrated it in Awsat (830), and Ibn Jareer Tabari in his Tafsir (8/87–89), both through the route of Raja bin Abu Salama, who said, Ubada bin Nusai told us, saying, our commander Ishaq bin Qabisa narrated to us, saying, Kaab said, and then he related it.Its isnad is hasan because of Ishaq bin Qabisa bin Zuayb, for he is hasan al-hadith.