“Abu ‘Abd Allah (a.s.) had a friend who almost all the time accompanied him whenever he went somewhere. Once he was walking with the Imam in the shoemaker’s place and his (man’s) slave from Sind was walking behind them. The man looked to find where his slave was. He could not see him. He tried three times and could not find him. At the fourth time he found him and said, ‘Where have you been, O son of a fornicating woman?’ The narrator has said that the Imam raised his hand and hit his own forehead and said, ‘All glory belongs to Allah, how you could accuse his mother? I considered you a pious person (restraining from sins). Now it shows you have no piety and restraint against evil.’ The man said, ‘May Allah keep my soul in service for your cause, his mother is a Sindy, (a pagan).’ The Imam said, ‘Did you not know that every people have a system of marriage? Stay away from me.’ The narrator has said that thereafter I never saw him walk with the Imam until death separated them from each other. ’ “In another Hadith it says, ‘Every people have a system of marriage. It keeps them reserved and away from fornication.’”