Hadith: ‘Ali (may Allah be pleased with him) was asked: Do you have any of the revelation, other than what is in Allah's Book? He said: No, by Him Who grows the grain and originates the soul, I have nothing other than the understanding of the Qur'an, which Allah bestows upon some people, and what is written in this sheet

عن أبي جحيفة رضي الله عنه قال: قلت لعلي رضي الله عنه : هل عندكم شيء من الوحي إلا ما في كتاب الله؟ قال: «لا والذي فَلَقَ الحَبَّةَ، وبَرَأَ النَّسْمَةَ، ما أعلمه إلا فَهْمَاً يُعطيه الله رجلا في القرآن، وما في هذه الصحيفة»، قلت: وما في الصحيفة؟ قال: «العَقْلُ، وفِكَاكُ الأَسير، وأن لا يُقتَلَ مسلم بكافر».
[صحيح] - [رواه البخاري]

Abu Juhayfah (may Allah be pleased with him) reported: I asked ‘Ali (may Allah be pleased with him): "Do you have any of the revelation, other than what is in Allah's Book?" He said: "No, by Him Who grows the grain and originates the soul, I have nothing other than the understanding of the Qur'an, which Allah bestows upon some people, and what is written on this sheet." I asked: "What is written on that sheet?" He replied: "(Injunctions on) blood money, the freeing of captives, and that a Muslim should not be killed for a disbeliever."
[Authentic hadith] - [Narrated by Bukhari]

Explanation

Abu Juhayfah (may Allah be pleased with him) asked ‘Ali (may Allah be pleased with him) whether the Prophet (may Allah's peace and blessings be upon him) had given his family special knowledge that he had not given to other people. Abu Juhayfah asked him this because some of the Shias claimed that the Prophet's family, especially ‘Ali, had parts of Divine revelation that the Prophet had assigned exclusively for them. Many people had asked ‘Ali about this issue, so he swore an oath that the Arabs used; swearing by Allah, the One Who created mankind and grew the grain. ‘Ali swore that the Prophet's family had nothing special apart from an understanding that Allah endowed some people with. In addition, ‘Ali also had a sheet on which he wrote what he heard from the Prophet, such as the rulings on blood money, the release of Muslim prisoners of war, and the ruling that a Muslim should not be killed for killing a non-Muslim, because they are not equal.