حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ نَهَى عَنِ الْوِصَالِ، قَالُوا فَإِنَّكَ تُوَاصِلُ يَا رَسُولَ اللَّهِ ‏.‏ قَالَ ‏"‏ إِنِّي لَسْتُ كَهَيْئَتِكُمْ إِنِّي أُطْعَمُ وَأُسْقَى ‏"‏ ‏.‏

Narrated Ibn 'Umar: The Messenger of Allah (PBUH) prohibited perpetual fasting. They (the people) said: You keep perpetual fasting, Messenger of Allah. He said: My position is not like that you yours. I am provided with food and drink. Translation Not Available

Book Ref: Sunan Abi Dawud Book 14 Hadith 2360
Web Ref:  Sunan Abi Dawud Book 13 Hadith 2353