Sahih Bukhari Volume 2, Book 19, Hadith 1154

حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرٍو، عَنْ أَبِي الْعَبَّاسِ، قَالَ سَمِعْتُ عَبْدَ اللَّهِ بْنَ عَمْرٍو ـ رضى الله عنهما ـ قَالَ لِي النَّبِيُّ صلى الله عليه وسلم ‏"‏ أَلَمْ أُخْبَرْ أَنَّكَ تَقُومُ اللَّيْلَ وَتَصُومُ النَّهَارَ ‏"‏ قُلْتُ إِنِّي أَفْعَلُ ذَلِكَ‏.‏ قَالَ ‏"‏ فَإِنَّكَ إِذَا فَعَلْتَ ذَلِكَ هَجَمَتْ عَيْنُكَ وَنَفِهَتْ نَفْسُكَ، وَإِنَّ لِنَفْسِكَ حَقٌّ، وَلأَهْلِكَ حَقٌّ، فَصُمْ وَأَفْطِرْ، وَقُمْ وَنَمْ ‏"‏‏

Narrated 'Abdullah bin Amr :Once Allah's Apostle(s.a.w.) said to me,"I have been informed that you pray all the night and fast during the day."I said"(yes) I do so". He said,"If you do so, your eye-sight will become weak and you wil become weak.No doubt,your body has a right on you and your family has a right on you, so fast(for some days) and do not fast (for some days),pray(for some time) and then sleep."