The Prophet is closer to the believers than their own selves and his wives are as their (believers’) mothers. Blood relatives have a greater claim on one another than the other believers and the Muhajirin (early Muslims who migrated from Makkah to Madinah) according to the Book of Allah: although you are permitted to some good (through leaving bequests) for your friends . This has been written in the Book of Allah.
Meaning:-
bequest: legacy, inheritance, endowment, settlement