Abu Qatada reported that Abu al Malih informed me:
I went along with your father to 'Abdullah b. Amr, and he narrated to us that the Messenger of Allah ( صلی اللہ علیہ وسلم ) was informed about my fasting and he came to me, and I placed a leather cushion filled with fibre of date-palms for him. He sat down upon the ground and there was that cushion between me and him, and he said to me: Does three days' fasting in a month not suffice you? I said: Messenger of Allah, (I am capable of observing more fasts). He said: (Would) five (not suffice for you)? I said: Messenger of Allah, (I am capable of observing more fasts) He said: (Would) seven (fasts) not suffice you? I said: Messenger of Allah, (I am capable of observing more fasts). He (the Holy Prophet) then said: (Would) nine (fasts not suffice you)? I said: Messenger of Allah, (I am capable of observing more fasts). He said: (Would) eleven (fasts not suffice you)? I said: Messenger of Allah, (I am capable of observing more fasts than these). Thereupon the Messenger of Allah ( صلی اللہ علیہ وسلم ) said: There is no fasting (better than) the fasting of David which comprises half of the age, fasting a day and not fasting a day.