Amatul Rahmân Omer:
The Prophet has a better claim on the believers than (that) they even have on themselves. (Not only that) his wives are (as) mothers to them. (But in the matters of inheritance) the blood relations are nearer one to another (and more deserving to get the heritage) in (accordance with) the Law of Allâh than the other believers (from among the Ansâr) as well as the immigrants (-Muhâjirs whom the Ansâr took as brothers and united with themselves). Yet you can do an act of kindness (to do honourable favour) to your friends. This is also laid down in the Book of Law.