Yahya related to me from Malik from Abu'n Nadr, the mawla of Umar ibn Ubaydullah, from Umayr, the mawla of Abdullah ibn Abbas, from Umm al-Fadl bint al-Harith, that she was present when some people were arguing on the day of Arafa about whether the Messenger of Allah ﷺ was fasting or not. Some of them said he was fasting, and some of them said he was not. So she sent a bowl of milk to him while his camel was standing still and he drank.
أَنَّ نَاسًا تَمَارَوْا عِنْدَهَا يَوْمَ عَرَفَةَ فِي صِيَامِ رَسُولِ اللَّهِ ﷺ فَقَالَ بَعْضُهُمْ هُوَ صَائِمٌ وَقَالَ بَعْضُهُمْ لَيْسَ بِصَائِمٍ فَأَرْسَلْتُ إِلَيْهِ بِقَدَحِ لَبَنٍ وَهُوَ وَاقِفٌ عَلَى بَعِيرِهِ فَشَرِبَ