١١ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عَبْدِ الله بْنِ مُحَمَّدٍ الْحَجَّالِ عَنْ ثَعْلَبَةَ بْنِ مَيْمُونٍ عَنْ عِمْرَانَ بْنِ عَلِيٍّ الْحَلَبِيِّ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلام) مَتَى تَجِبُ الْعَتَمَةُ قَالَ إِذَا غَابَ الشَّفَقُ وَالشَّفَقُ الْحُمْرَةُ فَقَالَ عُبَيْدُ الله أَصْلَحَكَ الله إِنَّهُ يَبْقَى بَعْدَ ذَهَابِ الْحُمْرَةِ ضَوْءٌ شَدِيدٌ مُعْتَرِضٌ فَقَالَ أَبُو عَبْدِ الله (عَلَيْهِ الْسَّلام) إِنَّ الشَّفَقَ إِنَّمَا هُوَ الْحُمْرَةُ وَلَيْسَ الضَّوْءُ مِنَ الشَّفَقِ.
11. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ‘Abd Allah ibn Muhammad al-Hajjal from Tha’labah ibn Maymun from ‘Imran ibn Ali al-Halabiy who has said the following: “I once asked abu ‘Abd Allah , about when al-‘Atmah (al-‘Isha’) becomes obligatory? He (the Imam) said, ‘When al-Shafaq (redness) disappears. Al-Shafaq is the redness.’ ‘Ubayd Allah then said, ‘I pray to Allah to keep you well, after the disappearance of redness there remains a strong light visible.’ Abu ‘Abd Allah , said, ‘Brightness (al-Shafaq) is the redness and light (or rays) are not from al-Shafaq.’” 