Khālid b. Makhlad > Mālik > al-Zuhrī > ʿUbaydullāh b. ʿAbdullāh b. ʿUtbah > Ibn ʿAbbās

"The Messenger of Allah ﷺ went out during the year of the conquest and he fasted. The people also fasted until reaching al-Qadeed (a place). Then, he broke his fast and the people broke their fast. They used to follow the latest action of the Messenger of Allah ﷺ ." – Strong Chain

أَخْبَرَنَا خَالِدُ بْنُ مَخْلَدٍ حَدَّثَنَا مَالِكٌ عَنْ الزُّهْرِيِّ عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ بْنِ عُتْبَةَ عَنْ ابْنِ عَبَّاسٍ قَالَ

«خَرَجَ رَسُولُ اللَّهِ ﷺ عَامَ الْفَتْحِ فَصَامَ وَصَامَ النَّاسُ حَتَّى بَلَغَ الْكَدِيدَ ثُمَّ أَفْطَرَ فَأَفْطَرَ النَّاسُ» فَكَانُوا يَأْخُذُونَ بِالْأَحْدَثِ فَالْأَحْدَثِ مِنْ فِعْلِ رَسُولِ اللَّهِ ﷺ – إسناده قوي