Chapter on Virtues of Hajj
Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 3|Chapter 2
وَ رُوِيَ: أَنَّهُ عَلَيْهِ اَلسَّلاَمُ حَجَّ عِشْرِينَ حَجَّةً مُسْتَسِرّاً وَ فِي كُلِّهَا يَمُرُّ بِالْمَأْزِمَيْنِ فَيَنْزِلُ وَ يَبُولُ.
It has been narrated: The Prophet (peace and blessings be upon him and his family) performed twenty Hajj pilgrimages secretly. In each of them, he would pass through the two mountain passes (Al-Ma'ziman), dismount, and relieve himself.
- Ṣaḥīḥ al-Faqīh