Narrated from Sayyiduna Umar bin Khattab (may Allah be pleased with him), he says: During the journey of Hudaybiyyah, we were with the Noble Prophet (peace and blessings be upon him). I asked him about a certain matter three times, but he (peace and blessings be upon him) did not give me any answer. I said to myself in my heart: O son of Khattab! May your mother lose you, three times you insisted on questioning the Noble Prophet (peace and blessings be upon him), but he did not give you any answer. Thinking this, I mounted my ride and moved ahead, fearing that perhaps some revelation might be sent down about me. Suddenly, a caller called out: O Umar! Where is Umar? I turned back, thinking that something had been revealed about me. When I presented myself, the Noble Prophet (peace and blessings be upon him) said: Tonight, a surah has been revealed to me that is dearer to me than the world and whatever is in it, that is: {إِنَّا فَتَحْنَا لَکَ فَتْحًا مُبِینًا لِیَغْفِرَ لَکَ اللّٰہُ مَا تَقَدَّمَ مِنْ ذَنْبِکَ وَمَا تَأَ خَّرَ} … Indeed, We have given you a clear victory, so that Allah may forgive you your past and future sins.

It is narrated from Sayyiduna Anas (may Allah be pleased with him) that when the Noble Prophet (peace and blessings be upon him) returned from Hudaybiyyah, these verses were revealed: { إِنَّا فَتَحْنَا لَکَ فَتْحًا مُبِینًا۔ لِیَغْفِرَ لَکَ اللّٰہُ مَا تَقَدَّمَ مِنْ ذَنْبِکَ وَمَا تَأَ خَّرَ وَیُتِمَّ نِعْمَتَہُ عَلَیْکَ وَیَہْدِیَکَ صِرَاطًا مُسْتَقِیمًا} … Indeed, We have granted you a clear victory, so that Allah may forgive you your past and future sins, and complete His favor upon you, and guide you to the straight path. The Muslims said: O Messenger of Allah! Congratulations to you for what Allah has granted you, but what is there for us? In response to them, this verse was revealed: {لِیُدْخِلَ الْمُؤْمِنِینَ وَالْمُؤْمِنَاتِ جَنَّاتٍ تَجْرِی مِنْ تَحْتِہَا الْأَ نْہَارُ خَالِدِینَ فِیہَا وَیُکَفِّرَ عَنْہُمْ سَیِّئَاتِہِمْ وَکَانَ ذٰلِکَ عِنْدَ اللّٰہِ فَوْزًا عَظِیمًا} … So that Allah may admit the believing men and believing women to gardens beneath which rivers flow, to abide therein forever, and remove from them their sins; and that is, with Allah, a great success.