Silsilah as-Sahihah 3428 — Virtue of Mu’adh ibn Jabal (ra)

It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The one who knows the most about what Allah has made lawful and unlawful is Mu'adh bin Jabal."