(539) بَابُ لا يُفَرِّقُ بَيْنَ اثْنَيْنِ
'Abdullah ibn 'Amr reported that the Prophet, may Allah blesshim and grant him peace, said, "It is not lawful for a man to separatetwo people except with the permission of both of them."
Reference: Al-Adab Al-Mufrad 1142
In-book reference: Book 46, Hadith 7
English translation: Book 46, Hadith 1142