Chapter on Virtues of Hajj
Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 3|Chapter 2
وَ مَنْ دَعَا لِأَرْبَعِينَ رَجُلاً مِنْ إِخْوَانِهِ قَبْلَ أَنْ يَدْعُوَ لِنَفْسِهِ اُسْتُجِيبَ لَهُ فِيهِمْ وَ فِي نَفْسِهِ ».
Whoever prays for forty of their brothers before praying for themselves will have their supplication answered both for them and for themselves.
- Ṣaḥīḥ al-Faqīh