Al-Kāfi

Hadith 216
good-deeds
4ـ عَنْهُ عَنْ فَضَالَةَ بْنِ أَيُّوبَ عَنْ مُعَاوِيَةَ بْنِ عَمَّارٍ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ كَانَ عَلِيُّ بْنُ الْحُسَيْنِ (صَلَّى اللهُ عَلَيْهِ وآلِه) يَقُولُ إِنِّي لأحِبُّ أَنْ أُدَاوِمَ عَلَى الْعَمَلِ وَإِنْ قَلَّ.
4. It is narrated from him (narrator of the Hadith above) from Fadalah ibn Ayyub from Mu’awiyah ibn ‘Ammar from Abu ‘Abdillah (a.s.) who has said the following: “Ali ibn al-Husayn (a.s.) would say, ‘I love to continue a good deed even if it is very little.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī