Sahih al-Bukhari 3526
Sahih al-Bukhari · Book 61: Virtues and Merits of the Prophet (pbuh) and his Companions · Whoever related kinship to his forefathers
Narrated Ibn `Abbas:
وَقَالَ لَنَا قَبِيصَةُ أَخْبَرَنَا سُفْيَانُ ، عَنْ حَبِيبِ بْنِ أَبِي ثَابِتٍ ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ ، عَنِ ابْنِ عَبَّاسٍ ، قَالَ لَمَّا نَزَلَتْ {وَأَنْذِرْ عَشِيرَتَكَ الأَقْرَبِينَ} جَعَلَ النَّبِيُّ صلى الله عليه وسلم يَدْعُوهُمْ قَبَائِلَ قَبَائِلَ.
When the Verse:-- 'And warn your tribe of near kindred' (26.214). was revealed, the Prophet (ﷺ) started calling every tribe by its name.