Abu Musa Al-Ash'ari (May Allah be pleased with him) reported:
I asked the Messenger of Allah (ﷺ): "Who is the most excellent among the Muslims?" He said, "One from whose tongue and hands the other Muslims are secure."[Al-Bukhari and Muslim].
App reference: Book 18, Hadith 2
Arabic/English book reference: Book 18, Hadith 1512