Salim bin 'Abdullah

Muadh ibn Jabal al-Ansari (may Allah be pleased with him) was a Companion of the Prophet ﷺ from the Khazraj tribe of Medina who embraced Islam at the Second Pledge of Aqabah while still a teenager. He was singled out by the Prophet ﷺ as the most learned of the Companions in what is halal and haram — knowledge of religious permissibility — a distinction that placed him in the highest rank of Companion scholars. The Prophet ﷺ sent him to Yemen as a teacher and judge, demonstrating extraordinary confidence in his legal judgment and character. He is known for a foundational hadith on the sources of Islamic law: when asked how he would judge matters, he replied he would judge by the Quran, then the Sunnah, then by his own considered reasoning — a hadith cited in discussions of ijtihad and legal methodology. He narrated approximately 157 hadiths and died during the plague of Amwas in Syria around 18 AH at a young age, mourned as one of the greatest scholars the Muslim community had known. This is a variant listing of the Companion also recorded as Muadh ibn Jabal.