Riyad as-Salihin

Riyad as-Salihin 1512

The Prohibition of Backbiting and the Commandment of Guarding one's Tongue
Arabic hadith text
وعن أبي موسى رضي الله عنه قال‏:‏ قلت‏:‏ يا رسول الله أي المسلمين أفضل‏؟‏ قال‏:‏ ‏"‏من سلم المسلمون من لسانه ويده‏"‏‏.‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏
Translation
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].