The Messenger of Allah ﷺ as saying: There is no alliance in Islam, and Islam strengthened the alliance made during pre-Islamic days. (Using translation from Abū Dāʾūd 2925)
قَالَ رَسُولُ اللَّهِ ﷺ «لَا حِلْفَ فِي الْإِسْلَامِ وَأَيُّمَا حِلْفٍ كَانَ فِي الْجَاهِلِيَّةِ لَمْ يَزِدْهُ الْإِسْلَامُ إِلَّا شِدَّةً»