Sahih Muslim | Book 35 | Hadith Number 6580
Narrated by Suhail
Abu Huraira reported that Fatima came to Allah's Apostle (may peace be upon him) and asked for a servant and told him of the hardship of household work. He said: You would not be able to get a servant from us. May I not direct you to what is better than the servant for you? Recite Subhaana Allah thirty-three times, al-Hamdu-li-Allah thirty-three times and Allah-o-Akbar thirty-four times as you go to bed. This hadith has been narrated on the authority of Suhail with the same chain of transmitters.