Al-Kāfi
Hadith 244عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ أَبِي نَصْرٍ عَنْ عَبْدِ الْكَرِيمِ عَنِ الْحَلَبِيِّ قَالَ سَأَلْتُ أَبَا عَبْدِ اللَّهِ ( عليه السلام ) عَنْ رَجُلٍ طَلَّقَ امْرَأَتَهُ وَ هِيَ حَائِضٌ فَقَالَ الطَّلَاقُ لِغَيْرِ السُّنَّةِ بَاطِلٌ .
6. A number of our people have narrated from Sahl ibn Ziyad from Ahmad ibn Muhammad from ibn abu Nasr from ‘Abd al-Karim from al-Halabiy who has said the following: “I once asked abu ‘Abd Allah (a.s.), about the case of a man who divorces his wife during her experiencing Hayd (menses). He (the Imam) said, ‘It is a divorce which is not according to Sunnah.”’