Abdullah bin Umar came to Abdullah bin Zubayr and said, "Ibn Zubayr, beware of committing transgression in the sanctuary of Allah , for I heard the Messenger of Allah ﷺ say, 'A man from Quraysh will commit transgression in it whose sins, if weighed against the sins of mankind and jinn combined, would outweigh them.' So take care that you are not that man."
حدثنا محمد بن كناسة
أتى عبد الله بن عمر عبد الله بن الزبير فقال يا ابن الزبير إياك والإلحاد في حرم الله تبارك وتعالى فإني سمعت رسول الله ﷺ يقول إنه سيلحد فيه رجل من قريش لو وزنت ذنوبه بذنوب الثقلين لرجحت قال فانظر لا تكونه
Its chain is sahih, but there is a defect in it. Something similar will come, at length and in brief, in the Musnad of Abdullah bin Amr bin As, 6847, 7043. There it was narrated by Abu Nadr Hashim bin Qasim from Ishaq bin Saeed from his father from Abdullah bin Amr bin As, and in the lengthier narration, 7043, Ibn Zubayr said to Abdullah bin Amr, "Make sure it is not you, son of Amr, for you have read the earlier scriptures," and so on. This description applies to Abdullah bin Amr bin As, for he was the one known for reading the books of earlier peoples and for reading Syriac.What further supports this is that the hadith here comes through the narration of Muhammad bin Abdullah bin Abdul-Ala, known as Ibn Kunasa. Although he is trustworthy, as we mentioned at 1415, he is not on the same level as Abu Nadr Hashim bin Qasim in memory and precision.It is also very unlikely that the story could have happened twice, once with Ibn Zubayr and Abdullah bin Umar and once with Abdullah bin Amr, since both narrations share the same source, both coming through Ishaq bin Saeed from his father, and they resemble one another completely or nearly completely.Hafiz Haythami mentioned the three narrations, 284-285, and said of each of the two hadiths of Ibn Amr bin As, "Ahmad narrated it, and its narrators are the narrators of the Sahih." And he said of the hadith of Ibn Umar bin Khattab, "Ahmad narrated it, and its narrators are trustworthy." He did not give preference to any of them over the others.See also what has already appeared in the Musnad of Uthman, 461, 481, 482.