وَأَخْرُجَ مُسْلِمٍ بَعْضِهِ مِنْ حَدِيثِ أَنَسٍ، وَفِيهِ: «أَنَّ مَنْ جَاءَ مِنْكُمْ لَمْ نَرُدْهُ عَلَيْكُمْ، وَمَنْ جَاءَكُمْ مِنَّا رَدَدْتُمُوهُ عَلَيْنَا. فَقَالُوا: أَنَكْتُبُ هَذَا يَا رَسُولُ اَللَّهُ? قَالَ: «نَعَمْ. إِنَّهُ مِنْ ذَهَبٍ مِنَّا إِلَيْهِمْ فَأَبْعَدَهُ اَللَّهُ، وَمَنْ جَاءَنَا مِنْهُمْ، فَسَيَجْعَلُ اَللَّهُ لَهُ فَرَجاً وَمُخْرِجاً»
‘ln case any of you comes to us we shall not send him back to you (i.e. one of the Muslims who goes back to Quraysh), and in case any of us came to you, you should send him back to us (any of the people of Quraysh who goes to the Prophet (sallallahu alayhi wa sallam) they will send him back to Makkah).’
The Companions asked the Prophet (sallallahu alayhi wa sallam),O Messenger of Allah (sallallahu alayhi wa sallam)! Will you write this down? He replied, “Yes. May Allah send out of His Mercy any of the Muslims who goes back to them. But Allah will grant a way out for anyone who comes to us from them.”