Abu Hurayra reported that the Prophet, may Allah bless him and grant him peace, forbade gatherings in the road. They said, "Messenger of Allah, it is hard for us to sit in our houses." He said, "If you must sit there, then fulfil the rights of the gathering." They asked, 'What is their right, Messenger of Allah?" He replied, "Guiding anyone who asks for directions, returning the greeting, lowering the eye, commanding the correct and forbidding the bad."
Reported by Ahmad (No. 8093, 8427). Cited in Al-Adab al-Mufrad (No. 1149).
Abu Hurayrah (may Allah be pleased with him) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) said: "It does not befit the truthful person to frequently curse others."