Muslim transmitted part of this hadith on the authority of Anas bin Malik (RAA) which says, '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 they will send him back to Makkah).' The Companions asked the Prophet (ﷺ),'O Messenger of Allah (ﷺ)! 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."
English reference: Book 11, Hadith 1352
Arabic reference: Book 11, Hadith 1326