Sahih Bukhari

Narrated Tawus:Ibn `Abbas recited the Qur'anic Verse:--'Except to be kind to me for my kin-ship to you--"" (42.23) Sa`id bin Jubair said, ""(The Verse implies) the kinship of Muhammad."" Ibn `Abbas said, ""There was not a single house (i.e. sub-tribe) of Quraish but had a kinship to the Prophet (ﷺ) and so the above Verse was revealed in this connection, and its interpretation is: 'O Quraish! You should keep good relation between me (i.e. Muhammad) and you