It is narrated from Nafi' (may Allah have mercy on him) that al-Hajjaj prolonged the sermon, so Sayyiduna Ibn Umar (may Allah be pleased with them both) laid his head in my lap. During the sermon al-Hajjaj said: "Ibn al-Zubayr has altered the Book of Allah." On hearing this, Sayyiduna Ibn Umar (may Allah be pleased with them both) sat up and said: "Neither you nor Ibn al-Zubayr has the power to do that, for Allah's word is: 'There is no changing the words of Allah' [Surah Yunus: 64] ." At this al-Hajjaj said: "Indeed, you have been given knowledge, which may perhaps benefit you." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), and they did not record it.