When there happened the disagreement between Ibn Az-Zubair and Ibn `Abbas, I said (to the latter), "(Why don't you take the oath of allegiance to him as) his father is Az-Zubair, and his mother is Asma,' and his aunt is `Aisha, and his maternal grandfather is Abu Bakr, and his grandmother is Safiya?"
Sahih al-Bukhari Book 65, Hadith 186
← Previous Hadith I was in the company of the Prophet (ﷺ) in the cave, and on seeing the traces of the pagans, I said, "O Allah's Messenger (ﷺ) If one of them (pagans) should lift up his foot, he will see us." He said, "What do you think of two, the third of whom is Allah?"

Sahih al-Bukhari Book 65, Hadith 185 Next Hadith → There was a disagreement between them (i.e. Ibn `Abbas and Ibn Az-Zubair) so I went to Ibn `Abbas in the morning and said (to him), "Do you want to fight against Ibn Zubair and thus make lawful what Allah has made unlawful (i.e. fighting in Meccas?" Ibn `Abbas said, "Allah forbid! Allah ordained that Ibn Zubair and Bani Umaiya would permit (fighting in Mecca), but by Allah, I will never regard it as permissible." Ibn `Abbas added. "The people asked me to take the oath of allegiance to Ibn AzZubair. I said, 'He is really entitled to assume authority for his father, Az-Zubair was the helper of the Prophet, his (maternal) grandfather, Abu Bakr was (the Prophet's) companion in the cave, his mother, Asma' was 'Dhatun-Nitaq', his aunt, `Aisha was the mother of the Believers, his paternal aunt, Khadija was the wife of the Prophet (ﷺ) , and the paternal aunt of the Prophet (ﷺ) was his grandmother. He himself is pious and chaste in Islam, well versed in the Knowledge of the Qur'an. By Allah! (Really, I left my relatives, Bani Umaiya for his sake though) they are my close relatives, and if they should be my rulers, they are equally apt to be so and are descended from a noble family.

Sahih al-Bukhari Book 65, Hadith 187