Surah Al-Ahzab, Verse 6:

The Prophet has a greater claim on the faithful than they have on themselves,

and his wives are (as) their mothers;

and the possessors of relationship have the better claim in the ordinance of Allah to inheritance,

one with respect to another, than (other) believers,

and (than) those who have fled (their homes),

except that you do some good to your friends;

this is written in the Book.