Narrated by Abdullah ibn Mas’ud

Allah’s Messenger صلى الله عليه وسلم said: “May Allah be well pleased with the servant who heard our words, remembered them, retained them well and then passed them on to others. How many scholars are there who are the scholars of religion without having an understanding of it, and how many scholars of religion are there who convey knowledge to those who are well versed compared with them. There are three things on account of which no rancour enters a Muslim heart: the sincerity of purpose for Allah’s sake, seeking goodness for the Muslims and adhering to their main body (jama’ah), for their prayers encompass them all round.”

Shafi’i reported it and also Bayhaqi in Al-Madkhal.