Chapter on Virtues of Hajj
Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 3|Chapter 2
وَ قَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «مَنْ حَجَّ سَنَةً وَ سَنَةً لاَ فَهُوَ مِمَّنْ أَدْمَنَ اَلْحَجَّ».
Imam Jafar ibn Muhammad Al-Sadiq عليه السلام said: "Whoever performs Hajj one year and does not the next, alternating years, is considered among those devoted to Hajj."
- Ṣaḥīḥ al-Faqīh