Mishkat al-MasabihChapter 18Hadith 3520
Full Sharh — Mishkat al-Masabih 3520
وَعَنْ أَبِي سَعِيدٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا بُويِعَ لِخَلِيفَتَيْنِ فاقتُلوا الآخِرَ منهُما» . رَوَاهُ مُسلم
English Translation
Abu Sa'id al-Khudri reported God’s Messenger as saying, “When allegiance is sworn to two caliphs kill the second of them.* Muslim transmitted it. * Some interpret ‘kill’ here as meaning to fight with. The tradition is directed against the possibility of two Caliphs holding power at the same time, even though the areas might be quite distinct.
Source
Mishkat al-Masabih(مشكاة المصابيح)
The Offices of Commander and Qadi
Hadith Number
3520