سَهْلُ بْنُ زِيَادٍ عَنْ أَحْمَدَ عَنْ عَبْدِ الْكَرِيمِ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ عِدَّةُ الَّتِي لَمْ تَحِضْ وَ الْمُسْتَحَاضَةِ الَّتِي لَا تَطْهُرُ ثَلَاثَةُ أَشْهُرٍ وَ عِدَّةُ الَّتِي تَحِيضُ وَ يَسْتَقِيمُ حَيْضُهَا ثَلَاثَةُ قُرُوءٍ وَ الْقُرُوءُ جَمْعُ الدَّمِ بَيْنَ الْحَيْضَتَيْنِ.
3. Sahl ibn Ziyad has narrated from Ahmad from ‘Abd al-Karim from abu Basir who has said the following: “Abu ‘Abd Allah 
, has said, ‘Waiting period of a woman who does not experience Hayd (menses) and the one who experiences Istihadah who does not be become clean is three months. Waiting period of one whose Hayd (menses) is straight is three Quru’ (Hayd free periods). Al-Quru’ (Hayd free period) is the time of accumulation of blood between two Hayd (menses).”’
