Congregational Prayer and Its Virtue
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 57
وَ قَدْ رُوِيَ: «أَنَّهُ يُحْسَبُ لَهُ أَفْضَلُهُمَا وَ أَتَمُّهُمَا.
It has been narrated: "He will be credited with the better and more complete of the two”.
- Ṣaḥīḥ al-Faqīh, p. 53