When Muaz bin Jabal was on his deathbed, it was said to him, "Abu Abdul-Rahman, give us your final counsel."He said, "Sit me up." Then he said, "Knowledge and faith remain in their place. Whoever seeks them will find them," repeating this three times. "And seek knowledge from four men, from Uwaymir Abu Darda, from Salman Farsi, from Abdullah bin Masud, and from Abdullah bin Salam, who was once a Jew and then embraced Islam, for I heard the Messenger of Allah ﷺ say that he is the tenth of ten in Paradise."
لما حضر معاذ بن جبل الموت قيل له: يا أبا عبد الرحمن أوصنا، قال: أجلسوني، فقال: إن العلم والإيمان مكانهما، من ابتغاهما وجدهما، يقول ذلك ثلاث مرات، والتمسوا العلم عند أربعة رهط، عند عويمر أبي الدرداء، وعند سلمان الفارسي، وعند عبد الله بن مسعود، وعند عبد الله بن سلام الذي كان يهوديا فأسلم، فإني سمعت رسول الله ﷺ يقول: إنه عاشر عشرة في الجنة.
Narrated by Tirmidhi (3804) and Ahmad (22104), and Ibn Hibban (7165) and Hakim (3/270) graded it sahih, all of them through the route of Muawiya bin Salih, from Rabia bin Yazid, from Abu Idris Khawlani, from Yazid bin Umayrah, who said, then he mentioned it. Its chain of transmission is hasan because of Muawiya bin Salih bin Hudayr, for his narrations are hasan. Ibn Hajar deemed its chain sound in al-Isabah.