40:2Ghafir

"He it is Who revealed to thee (Muhammad) the Book (the Qur'an) wherein there are clear revelations-these are the substance of the Book and others are allegorical (verses). And as for those who have a yearning for error they go after the allegorical verses seeking (to cause) dissension, by seeking to explain them. And none knows their implications but Allah, and those who are sound in knowledge say: We affirm our faith in everything which is from our Lord. It is only the persons of understanding who really heed" (Al-Qur'an 3:7). 'A'isha (further) reported that Allah's Messenger (ﷺ) said (in connection with these verses): When you see such verses, avoid them, for it is they whom Allah has pointed out (in the mentioned verses).

By Him besides Whom there is no god, there is no chapter in the Book of Allah about which I do not know as to where it was revealed and there is no verse about which I do not know in what context it was revealed, and if I were to know of one having a better understanding of the Book of Allah than I (and I could reach him) on the back of the mule, I would have definitely gone to him on camel's back.

O Allah, Revealer of the Book, swift in (taking) account, put the tribes to rout. O Lord, defeat them and shake them.

When revelation descended upon Allah's Messenger (ﷺ) even during the cold days, his forehead perspired.

The last verse revealed (in the Holy Quran) is that pertaining to Kalala, and the last sura revealed is Sura al-Bara'at.