prophet Mohammed is the man of reality and justice :

he was liking the reality and justice and applying it . he didn't flatter any one for his money or lineage but for him the weak is strong until he takes his rights and the strong is weak until gives rights for others

 he didn't flatter any one even his nearest relatives : you see him in  one time a lady from Bani Makhzoom  steeled and he was going to punish her  but his companion ( Osama Bin zaed ) tried to save her from punishment but prophet Mohammed became very angry and spoke to Osama that is not right  how you  ignore a penalty from our God . he told Osama that in the old nations they had punished  from God because when the strong is steeling no any action taken , but if the weak is steeling they punish him . so why this difference in the judgment