He said...
He said: I have a hadith with me on David’s fast which I will tell you if you wish. Surely, he fasted frequently, rose up for night prayer most frequently and he was so brave he never ran away whenever he was challenged. He would fast a day and break it the next day. The Messenger of Allah has said: The best fast was that of David.
إِنَّ رَجُلا سَأَلَ ابْنَ عَبّاسٍ عَنْ الصِّيامِ فَقَالَ: لأُحَدِّثَنَّكَ بِحَدِيثٍ كَانَ عِنْدي في الْبَحْثِ مَخْزُونًا، إِنْ شِئْتَ أَنْبَأْتُكَ بِصَوْمِ دَاوُودَ فَإِنَّهُ كَانَ صَوّامًا قَوّامًا وَكَانَ شُجَاعًا لا يَفُرُّ إِذَا لاقَى، وَكَانَ يَصُومُ يَوْمًا وَيَفْط
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