عَنْ عَطَاءٍ أَنَّ عَبْدَ اللَّهِ بْنَ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا دَعَا الْفَضْلَ يَوْمَ عَرَفَةَ إِلَى طَعَامٍ، فَقَالَ: إِنِّي صَائِمٌ، فَقَالَ عَبْدُ اللَّهِ: لَا تَصُمْ، فَإِنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قُرِّبَ إِلَيْهِ حِلَابٍ، فَشَرِبَ مِنْهُ هَذَا الْيَوْمَ وَإِنَّ النَّاسَ يَسْتَنُّونَ بِكُمْ
Sayyiduna Abdullah bin Abbas (may Allah be pleased with him) invited Sayyiduna Fadl (may Allah be pleased with him) to eat on the day of Arafah, but he said: I am fasting. Upon hearing this, he said: Do not fast on this day, because on this very day milk was presented to the Noble Prophet (peace and blessings be upon him), which he drank, and people also follow your example.