On the authority of Abu Dharr Jundub ibn Junadah, and Abu Abdur-Rahman Muadh bin Jabal (may Allah be pleased with him), that the Messenger of Allah (Saw) 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 was a hasan (good) hadeeth, and in some copies it is stated to be a hasan saheeh hadeeth.
عَنْ أَبِي ذَرٍّ جُنْدَبِ بْنِ جُنَادَةَ، وَأَبِي عَبْدِ الرَّحْمَنِ مُعَاذِ بْنِ جَبَلٍ رَضِيَ اللَّهُ عَنْهُمَا، عَنْ رَسُولِ اللَّهِ صلى الله عليه و سلم قَالَ: «اتَّقِ اللَّهَ حَيْثُمَا كُنْت، وَأَتْبِعْ السَّيِّئَةَ الْحَسَنَةَ تَمْحُهَا، وَخَالِقْ النَّاسَ بِخُلُقٍ حَسَنٍ» . رَوَاهُ التِّرْمِذِيُّ [رقم:1987] وَقَالَ: حَدِيثٌ حَسَنٌ، وَفِي بَعْضِ النُّسَخِ: حَسَنٌ صَحِيحٌ.