Verily, my Lord has informed me that I will see a sign in my Ummah and He has commanded me that when I see it, I should glorify His praises and seek His forgiveness, for He is the One Who accepts repentance. And indeed I have seen it (i.e., the sign.
When there comes the help of Allah and the Conquest (Al-Fath).
And you see that the people enter Allah's religion in crowds.
So glorify the praises of your Lord, and ask His forgiveness. Verily, He is the One Who accepts the repentance and Who forgives."
Muslim also recorded this Hadith.
The meaning of Al-Fath here is the conquest of Makkah, and there is only one view concerning it. For indeed the different areas of the Arabs were waiting for the conquest of Makkah before they would accept Islam. They said,
"If he (Muhammad is victorious over his people, then he is a (true) Prophet."
So when Allah gave him victory over Makkah, they entered into the religion of Allah (Islam) in crowds. Thus, two years did not pass (after the conquest of Makkah) before the peninsula of the Arabs was laden with faith. And there did not remain any of the tribes of the Arabs except that they professed (their acceptance) of Islam. And all praise and blessings are due to Allah.
Al-Bukhari recorded in his Sahih that `Amr bin Salamah said,
"When Makkah was conquered, all of the people rushed to the Messenger of Allah to profess their Islam. The various regions were delaying their acceptance of Islam until Makkah was conquered. The people used to say,
`Leave him and his people alone. If he is victorious over them he is a (true) Prophet."'
We have researched the war expedition for conquest of Makkah in our book As-Surah. Therefore, whoever wishes he may review it there.
And all praise and blessings are due to Allah. Imam Ahmad recorded from Abu `Ammar that a neighbor of Jabir bin `Abdullah told him,
"I returned from a journey and Jabir bin `Abdullah came and greeted me. So I began to talk with him about the divisions among the people and what they had started doing. Thus, Jabir began to cry and he said, `I heard the Messenger of Allah saying,
إِنَّ النَّاسَ دَخَلُوا فِي دِينِ اللهِ أَفْوَاجًا وَسَيَخْرُجُونَ مِنْهُ أَفْوَاجًا
Verily, the people have entered into the religion of Allah in crowds and they will also leave it in crowds."
This is the end of the Tafsir of Surah An-Nasr, and all praise and blessings are due to Allah