Sunan an-Nasa'i 2345

It was the practice of the Messenger of Allah (ﷺ) to not to omit fast on 'bright days' whether he was staying at a place or on a journey. [An-Nasa'i].

"‏لا يفطر أيام البيض في حضر ولا سفر‏"

Ibn ‘Abbas said that it was the custom of God’s messenger not to eat on the middle days* of the month whether travelling or not. *Literally, the days of the white (nights). These are the days following the thirteenth, fourteenth, and fifteenth nights of the month, the nights when there is most…

وَعَنِ ابْنِ عَبَّاسٍ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَا يُفْطِرُ أَيَّامَ الْبيض فِي حضر وَلَا فِي سفر. رَوَاهُ النَّسَائِيّ

Narrated by Ibn ‘Abbās