Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
tabarani:9156 – Isḥāq b. Ibrāhīm > ʿAbd al-Razzāq > al-Thawrī > al-Aʿmash > ʿUmārah b. ʿUmayr > Abū al-Aḥwaṣ > ʿAbdullāh

[Machine] "Get used to doing good, for goodness is only achieved through habituation."  

الطبراني:٩١٥٦ – حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ عَنْ عَبْدِ الرَّزَّاقِ عَنِ الثَّوْرِيِّ عَنِ الْأَعْمَشِ عَنْ عُمَارَةَ بْنِ عُمَيْرٍ عَنْ أَبِي الْأَحْوَصِ عَنْ عَبْدِ اللهِ قَالَ

«تَعَوَّدُوا الْخَيْرَ فَإِنَّمَا الْخَيْرُ بِالْعَادَةِ»  

See similar narrations below:

Collected by Ṭabarānī
tabarani:8755 – Muḥammad b. al-Naḍr al-Azdī > Muʿāwiyah b. ʿAmr > Zāʾidah > al-Aʿmash > ʿUmārah > Abū al-Aḥwaṣ > ʿAbdullāh

[Machine] "Get accustomed to doing good, for indeed good becomes customary. And guard your intentions in prayer."  

الطبراني:٨٧٥٥ – حَدَّثَنَا مُحَمَّدُ بْنُ النَّضْرِ الْأَزْدِيُّ ثنا مُعَاوِيَةُ بْنُ عَمْرٍو ثنا زَائِدَةُ عَنِ الْأَعْمَشِ عَنْ عُمَارَةَ عَنْ أَبِي الْأَحْوَصِ عَنْ عَبْدِ اللهِ قَالَ

«تَعَوَّدُوا الْخَيْرَ فَإِنَّ الْخَيْرَ بِالْعَادَةِ وَحَافِظُوا عَلَى نِيَّاتِكُمْ فِي الصَّلَاةِ»