Jundub reported God’s messenger as saying,“ If anyone interprets the Qur’an in the light of his own opinion and is right, he has erred.”Tirmidhi transmitted it.

Abu Huraira reported God’s messenger as saying,“Disputation about the Qur’an is infidelity.”Ahmad and Abu Dawud transmitted it.

‘Amr b. Shu'aib quoted the authority of his father from his grandfather who said that the Prophet heard some people disagreeing about the Qur’an and said,“It was just on this account that your predecessors perished:they set parts of God’s Book against others, whereas God's Book was sent down only to be consistent; so do not use parts to falsify others. Speak about as much of it as you know, but where you are ignorant entrust it to him who knows.”Ahmad and Ibn Majah transmitted it.

Ibn Mas'ud reported God's messenger as saying,“The Qur'an was sent down in seven modes. Every verse in it has an external and an internal meaning, and every interdiction has a source of reference.”Baghawi transmitted it in Sharh as-sunna.

‘Abdallah b. ‘Amr reported God's messenger as saying,“Knowledge has three categories:a precise verse, or an established sunna, or a firm obligatory duty. Anything else is an extra.”Abu Dawud and Ibn Majah transmitted it.

‘Auf b. Malik al-Ashja‘i reported God’s messenger as saying, "Only a ruler, or one put in charge, or one who is presumptuous gives instruction."* Abu Dawud transmitted it,

and Darimi transmitted it from ' Amr b. Shu'aib from his father from his grandfather. A version has, "Or a hypocrite”instead of "one who is presumptuous”. *The word used here is yaqussu, which may be translated as given above, but which may also be translated as“inflicts punishment.”

Abu Huraira reported God’s messenger as saying,“If anyone is given a legal decision ignorantly, the sin rests on the one who gave it; and if anyone advises his brother, knowing that right guidance lies in another direction, he has deceived him.”Abu Dawud transmitted it.

Mu'awiya said that the Prophet forbade the discussion of thorny questions. Abu Dawud transmitted it.

Abu Huraira reported God’s messenger as saying, "Learn the things which are made obligatory and the Qur’an, and teach them to people, for I shall die.”Tirmidhi transmitted it.