'Abdullah ibn 'Amr reported his fasting was mentioned to the Messenger of Allah, may Allah bless him and grant him peace. He said, "The Prophet, may Allah bless him and grant him peace, came to visit me and I threw him a leather cushion stuffed with palm fibre, but he sat on the ground. The cushion remained between me and him. He asked me, 'Are three days every month enough for you?' I said, 'Messenger of Allah!' He said, 'Five?' I said, 'Messenger of Allah!' He said, Eleven?' I said, 'Messenger of Allah!' Then he said, 'Do not exceed the fast of Da'ud. Half of the time. Fast one day and break the fast the next.'"  

أَنَّ النَّبِيَّ ﷺ ذُكِرَ لَهُ صَوْمِي فَدَخَلَ عَلَيَّ فَأَلْقَيْتُ لَهُ وِسَادَةً مِنْ أَدَمٍ حَشْوُهَا لِيفٌ فَجَلَسَ عَلَى الأَرْضِ وَصَارَتِ الْوِسَادَةُ بَيْنِي وَبَيْنَهُ فَقَالَ لِي أَمَا يَكْفِيكَ مِنْ كُلِّ شَهْرٍ ثَلاَثَةُ أَيَّامٍ؟ قَالَ قُلْتُ يَا رَسُولَ اللهِ قَالَ خَمْسًا قُلْتُ يَا رَسُولَ اللهِ قَالَ سَبْعًا قُلْتُ يَا رَسُولَ اللهِ قَالَ تِسْعًا قُلْتُ يَا رَسُولَ اللهِ قَالَ إِحْدَى عَشْرَةَ قُلْتُ يَا رَسُولَ اللهِ قَالَ لاَ صَوْمَ فَوْقَ صَوْمِ دَاوُدَ شَطْرَ الدَّهْرِ صِيَامُ يَوْمٍ وَإِفْطَارُ يَوْمٍ  

'Abdullah ibn Busr reported that the Prophet, may Allah bless him and grant him peace, passed by 'Abdullah's father who threw the Prophet a rug on which he sat.  

أَنَّ النَّبِيَّ ﷺ مَرَّ عَلَى أَبِيهِ فَأَلْقَى لَهُ قَطِيفَةً فَجَلَسَ عَلَيْهَا