Sunan Ibn Majah, Hadith 2659 ⓘ
It was narrated from 'Amr bin Shu'aib, from his father, from his grandfather, that the Messenger of Allah said: “A Muslim should not be killed in retaliation for the murder of a disbeliever.”
حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ عَيَّاشٍ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ يُقْتَلُ مُسْلِمٌ بِكَافِرٍ " .
also referenced under: Book 21, Hadith 2761 (In-Book) & Volume 3, Book 21, Hadith 2659 (DarusSalam)