Sahih Muslim Book - 32, Hadith - 4632

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِى شَيْبَةَ حَدَّثَنَا عَفَّانُ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ عَنْ ثَابِتٍ عَنْ أَنَسٍ أَنَّ قُرَيْشًا صَالَحُوا النَّبِىَّ -صلى الله عليه وسلم- فِيهِمْ سُهَيْلُ بْنُ عَمْرٍو فَقَالَ النَّبِىُّ -صلى الله عليه وسلم- لِعَلِىٍّ « اكْتُبْ بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ ». قَالَ سُهَيْلٌ أَمَّا بِاسْمِ اللَّهِ فَمَا نَدْرِى مَا بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ وَلَكِنِ اكْتُبْ مَا نَعْرِفُ بِاسْمِكَ اللَّهُمَّ فَقَالَ « اكْتُبْ مِنْ مُحَمَّدٍ رَسُولِ اللَّهِ ». قَالُوا لَوْ عَلِمْنَا أَنَّكَ رَسُولُ اللَّهِ لاَتَّبَعْنَاكَ وَلَكِنِ اكْتُبِ اسْمَكَ وَاسْمَ أَبِيكَ. فَقَالَ النَّبِىُّ -صلى الله عليه وسلم- « اكْتُبْ مِنْ مُحَمَّدِ بْنِ عَبْدِ اللَّهِ ». فَاشْتَرَطُوا عَلَى النَّبِىِّ -صلى الله عليه وسلم- أَنَّ مَنْ جَاءَ مِنْكُمْ لَمْ نَرُدَّهُ عَلَيْكُمْ وَمَنْ جَاءَكُمْ مِنَّا رَدَدْتُمُوهُ عَلَيْنَا فَقَالُوا يَا رَسُولَ اللَّهِ أَنَكْتُبُ هَذَا قَالَ « نَعَمْ إِنَّهُ مَنْ ذَهَبَ مِنَّا إِلَيْهِمْ فَأَبْعَدَهُ اللَّهُ وَمَنْ جَاءَنَا مِنْهُمْ سَيَجْعَلُ اللَّهُ لَهُ فَرَجًا وَمَخْرَجًا ».

It was narrated from Anas that Quraish made a treaty with the Prophet (s.a.w), and among them was Suhail bin 'Amr. The Prophet (s.a.w) said to 'Ali: "Write: In the Name of Allah, the Most Gracious, the Most Merciful." Suhail said: As for in the Name of Allah, we do not know what 'In the Name of Allah, the Most Gracious, the Most Merciful is.' Rather write what we know: Bismika Allahumma (In Your Name O Allah). He said: "Write: From Muhammad the Messenger of Allah." They said: If we knew that you were the Messenger of Allah, we would have followed you. Rather write your name and the name of your father. So the Prophet (s.a.w) said: "Write: from Muhammad bin 'Abdullah.'' And they stipulated to the Prophet (s.a.w): Whoever comes (to us) from you, we will not return him to you, but whoever comes to you from among us, you will send him back to us. They said: O Messenger of Allah, should we write this? He said: Yes. Whoever among us goes to them, may Allah keep him away, and whoever comes to us from them, Allah will grant him a way out."