Al-Kāfi - The Book of Haj

3ـ عَلِيُّ بْنُ إِبْرَاهِي٠َ بِإِسْنَادِهِ قَالَ أَشْهُرُ الْحَجِّ شَوَّالٌ وَذُو الْقَعْدَةِ وَعَشْرٌ ٠ِنْ ذِي الْحِجَّةِ وَأَشْهُرُ السِّيَاحَةِ عِشْرُونَ ٠ِنْ ذِي الْحِجَّةِ وَالْ٠ُ وَصَفَرُ وَشَهْرُ رَبِيعٍ الأَوَّلِ وَعَشْرٌ ٠ِنْ شَهْرِ رَبِيعٍ الآخِرِ. 3.

Ali has narrated through the same chain of his narrators has said the following: “He (the Imam) ‘Alayhi al-Salam, has said that the months of al-Hajj are Shawwal, Dhu al-Qa’dah and ten days of Dhu al-Hajj ah. The visiting months commence from twentieth of Dhu al-Hajj ah onward and includes the month of Muharram, Safar, Rabi’ al-Awwal and ten days of Rabi‘ al-Akhir.’” رسل - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (17/185))