The Prophet is closer to the believers than their ownselves, and his wives are their (believers') mothers (as regards respect and marriage). And blood relations among each other have closer personal ties in the Decree of Allah (regarding inheritance) than (the brotherhood of) the believers and the Muhajirun (emigrants from Makkah, etc.), except that you do kindness to those brothers (when the Prophet SAW joined them in brotherhood ties). This has been written in the (Allah's Book of Divine) Decrees (AlLauh AlMahfuz)."