Narrated Anas bin Malik:

regarding Allah's Statement: "Verily! We have granted you (O, Muhammad) Manifest victory." (48.1) It refers to the Al-Hudaibiya Pledge. And the companions of the Prophet (ﷺ) said (to the Prophet), "Congratulations and happiness for you; but what reward shall we get?" So Allah revealed:-- "That He may admit the believing men and women to gardens beneath which rivers flow." (48.5)

It has been narrated on the authority of Anas b. Malik who said: When they (Companions of the Holy Prophet) were overwhelmed with grief and distress on his return from Hudaibiya where he had slaughtered his sacrificial beasts (not being allowed to proceed to Mecca), the Qur'anic verse: Inna fatahna... laka fathan mobinan to fauzan 'aziman, was revealed to him. (At this) he said: On me has descended a verse that is dearer to me than the whole world.