Chapter on Virtues of Hajj
Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 3|Chapter 2
وَ قَالَ: «اَلْعُمْرَةُ إِلَى اَلْعُمْرَةِ كَفَّارَةُ مَا بَيْنَهُمَا».
Imam عليه السلام said: "Umrah to Umrah is an expiation for what occurs between them."
- Ṣaḥīḥ al-Faqīh