Imaam Maalik (rahimahullah) would say, “Arguing and quarrelling in the knowledge of Deen causes the noor of knowledge to be lost from the hearts of the servants.”

Imaam Maalik (rahimahullah) was once asked, “If a person has been blessed with the knowledge of the Sunnah, should he argue in defense of the Sunnah when he sees people opposing it?” Imaam Maalik (rahimahullah) replied, “No! However, he should inform people of the Sunnah. If they accept what he says, then well and good, and if not, then he should remain silent (and refrain from arguing with them).”

(Ad-Deebaaj-ul-Muzahhab 1/115)