Abu Dawud
Prayer
Book Number: 002 / Hadith Number: 1315
Narated By Rabi'ah b, Ka'b al-Aslami : I used to live with the Apostle of Allah (pbuh) at night; I would bring water for his ablution and his need. He said: Ask me. I said: Your company is in Paradise. He said: Is there anything other than that? I said: It is only that. He said: Help me for yourself by making prostration abundantly.