Narrated Jubair bin Mutim: The Messenger of Allah ﷺ as saying: There is no alliance in Islam, and Islam strengthened the alliance made during pre-Islamic days.
Related hadith on this topic
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues:
Islam has made its adherents brothers to one another.
As Allah the Exalted says:
(إِنَّمَا الْمُؤْمِنُونَ إِخْوَةٌ) (Al-Hujurat:10) The believers are but brothers.
Thus, it is obligatory that they live as one soul and one body.
They no longer have any need to make artificial agreements as was done in the pre-Islamic era.
Rather, this matter is a fundamental element of their creed and practice.
Nevertheless, whatever agreements were made before this,
Islam strengthens and affirms them on the basis of goodness and righteousness.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 2925