A man came to the Prophet and said, "O Messenger of Allah! Who among the people is the most worthy of my good companionship?". The Prophet (saw) said, "Your mother." The man said, "Then who?" The Prophet said, "Then your mother." The man further asked, "Then who?". The Prophet said: "Then your mother." The man asked again, "Then who?". The Prophet said, "Then your father." 

(Hadith Bukhari, Muslim)