The Messenger of Allah ﷺ as saying: There is no alliance in Islam, and Islam strengthened the alliance made during pre-Islamic days.
قَالَ رَسُولُ اللَّهِ ﷺ لاَ حِلْفَ فِي الإِسْلاَمِ وَأَيُّمَا حِلْفٍ كَانَ فِي الْجَاهِلِيَّةِ لَمْ يَزِدْهُ الإِسْلاَمُ إِلاَّ شِدَّةً