Maymunah reported: People had doubts about the fasting of the Prophet, peace and blessings be upon him, on the day of Arafat. She sent him a cup of milk while he was standing on the plain and he drank from it while the people were looking at him.
Source: Ṣaḥīḥ al-Bukhārī 1888, Ṣaḥīḥ Muslim 1124
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ مَيْمُونَةَ رَضِيَ اللَّهُ عَنْهَا أَنَّ النَّاسَ شَكُّوا فِي صِيَامِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَوْمَ عَرَفَةَ فَأَرْسَلَتْ إِلَيْهِ بِحِلَابٍ وَهُوَ وَاقِفٌ فِي الْمَوْقِفِ فَشَرِبَ مِنْهُ وَالنَّاسُ يَنْظُرُونَ
1888 صحيح البخاري كتاب الصوم باب صوم يوم عرفة
1124 صحيح مسلم كتاب الصيام باب استحباب الفطر للحاج بعرفات يوم عرفة