Ibn ʿAbbas recited the Qur'anic Verse:--'Except to be kind to me for my kin-ship to you--" (42.23) Saʿid bin Jubair said, "(The Verse implies) the kinship of Muhammad." Ibn ʿAbbas 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."
إِنَّ النَّبِيَّ ﷺ لَمْ يَكُنْ بَطْنٌ مِنْ قُرَيْشٍ إِلاَّ وَلَهُ فِيهِ قَرَابَةٌ فَنَزَلَتْ عَلَيْهِ إِلاَّ أَنْ تَصِلُوا قَرَابَةً بَيْنِي وَبَيْنَكُمْ