Verifying the Rise of the New Moon and Finding Witnesses for It
Al-Kāfi|Volume 4|Book 2|Chapter 6
1ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ حَمَّادٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ إِذَا رَأَوُا الْهِلالَ قَبْلَ الزَّوَالِ فَهُوَ لِلَيْلَتِهِ الْمَاضِيَةِ وَإِذَا رَأَوْهُ بَعْدَ الزَّوَالِ فَهُوَ لِلَيْلَتِهِ الْمُسْتَقْبَلَةِ.
10. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad who has said the following: “Abu ‘Abd Allah عليه السلام, has said, ‘If they can see the crescent before Zawal (declining of the sun toward the west at noontime), then it is of the last night but if they see it after Zawal, then it is of the coming night.’”
- Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (6/231)
- Ṣaḥīḥ al-Kāfī, vol. 2, p. 63