The Book of Oaths (Kitab Al-Aiman) 
Muslim :: Book 15 : Hadith 4097
Ibn Umar reported Allah's Messenger (may peace be upon him) as saying: When a slave looks to the welfare of his master and worships Allah well, he has two rewards for him.
The Book of Oaths (Kitab Al-Aiman)
Muslim :: Book 15 : Hadith 4097
Ibn Umar reported Allah's Messenger (may peace be upon him) as saying: When a slave looks to the welfare of his master and worships Allah well, he has two rewards for him.