An-Nawawy’s Forty Hadiths: (18) Concept of Piety
On the authority of Abu Dharr Jundub ibn Junadah, and Abu Abdur-Rahman Muadh ibn Jabal (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said, "Have taqwa (fear) of Allah wherever you may be, and follow up a bad deed with a good deed which will wipe it out, and behave well towards the people." It was related by at-Tirmidhi who said it is a hasan (good) hadeeth. In some copies, it is stated to be a hasan (good) saheeh (authentic) hadeeth.