Sahih al-Bukhari 1153
Book 19: Prayer at Night (Tahajjud) · Hadith 34
Hadith text
Narrated 'Abdullah bin 'Amr:Once Allah's Messenger (ﷺ) said to me, "I have been informed that you offer Salat (prayer) all the night and observe Saum (fast) during the day." I said, "(Yes) I do so." He said, "If you do so, your eye sight will become weak and you will become weak. No doubt, your body has right on you, and your family has right on you, so observe Saum (for some days) and do not observe it (for some days), offer Salat (for sometime) and then sleep
Abdullah bin Amr bataate hain: Ek baar Allah ke Rasool ne mujhse kaha: "Mujhe bataya gaya hai ke tum poori raat namaz padhte ho aur din mein roza rakhte ho." Maine kaha: "Haan, main aisa hi karta hoon." Aap ne farmaya: "Agar tum aisa karoge, tumhari nazar kamzor ho jayegi aur tum khud kamzor ho jaoge. Beshak tumhare jism ka bhi tumpar haqq hai, aur tumhare ghar walon ka bhi haqq hai. Isliye (kabhi) roza rakho aur (kabhi) na rakho, namaz padho aur so bhi jao."
Sahih al-Bukhari 1153 · Book 19, Hadith 34