It was narrated from Ibn 'Abbas that:

the Prophet went out in Ramadan and fasted until he came to Qudaid, then a cup of milk was brought to him and he drank and broke his fast; he and his Companions.

أَخْبَرَنَا مُحَمَّدُ بْنُ حَاتِمٍ، قَالَ أَنْبَأَنَا سُوَيْدٌ، قَالَ أَخْبَرَنَا عَبْدُ اللَّهِ، عَنْ شُعْبَةَ، عَنِ الْحَكَمِ، عَنْ مِقْسَمٍ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ النَّبِيَّ ﷺ خَرَجَ فِي رَمَضَانَ فَصَامَ حَتَّى أَتَى قُدَيْدًا ثُمَّ أُتِيَ بِقَدَحٍ مِنْ لَبَنٍ فَشَرِبَ وَأَفْطَرَ هُوَ وَأَصْحَابُهُ .