It was narrated that Abu Hurairah said: "A man from Banu Fazarah came to the Messenger of Allah P.B.U.H and said: '0 Messenger of Allah, my wife has given birth to a black boy.' The Messenger of Allah P.B.U.H said: 'Do you have camels?' He said', ''{es.' Be said: 'What color are they?' Be said 'Red. ' He said' . 'Are th grey ones am ere any 'Yes, there aroengthem?' He said: some among them.' He grey ones does that come from? He said: Where 'Perhaps it is hereditary?.' He said: 'Likewise , perhaps this is hereditary." (Sahih)