Chapter on Virtues of Hajj
Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 3|Chapter 2
وَ مَنْ حَجَّ أَرْبَعِينَ حَجَّةً قِيلَ لَهُ اِشْفَعْ فِيمَنْ أَحْبَبْتَ وَ يُفْتَحُ لَهُ بَابٌ مِنْ أَبْوَابِ اَلْجَنَّةِ يَدْخُلُ مِنْهُ هُوَ وَ مَنْ يَشْفَعُ لَهُ ».
Whoever performs forty Hajj will be told, 'Intercede for whomever you wish,' and a door of Paradise will be opened for them through which they and those for whom they intercede will enter.
- Ṣaḥīḥ al-Faqīh