أَحَبُّ الْأَعْمَالِ إِلَى اللَّهِ عَزَّ وَ جَلَّ مَا دَاوَمَ عَلَيْهِ الْعَبْدُ وَ إِنْ قَلَّ.
Imam Ja‘far al-Ṣadiq (as):
The most beloved of all acts to Allah, Mighty and Exalted, is that which the servant performs consistently, even if it be little.
Source:
al-Kāfī
Vol3
P212
ID: 16799