Hadith 3983

‘Amr b. Shu'aib, on his father’s authority, told that his grandfather reported God’s Messenger as saying in the course of his sermon, "Observe fully the alliance made in the pre-Islamic period, for it, i.e. Islam, will only make it stronger; but make no new alliances in Islam.” The source is not given. See Tirmidhi, Siyar, 30

وَعَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ فِي خطْبَة: «أَوْفوا بِحلف الْجَاهِلِيَّة فَإِنَّهُ لَا يزِيد يَعْنِي الْإِسْلَامَ إِلَّا شِدَّةً وَلَا تُحْدِثُوا حَلِفًا فِي الإِسلامِ» . رَوَاهُ الترمذيُّ من طريقِ ابنِ ذَكْوَانَ عَنْ عَمْرٍو وَقَالَ: حَسَنٌ.

Reference: 5639830
In-book reference: Book 19, Hadith 3983