أَخْبَرَنَا مُحَمَّدُ بْنُ يُوسُفَ، قَالَ: قَالَ سُفْيَانُ: "الْكُدْرَةُ وَالصُّفْرَةُ فِي أَيَّامِ الْحَيْضِ حَيْضٌ، وَكُلُّ شَيْءٍ رَأَتْهُ بَعْدَ أَيَّامِ الْحَيْضِ مِنْ دَمٍ أَوْ كُدْرَةٍ أَوْ صُفْرَةٍ، فَهِيَ مُسْتَحَاضَةٌ"، سُئِلَ عَبْدُ الله: تَأْخُذُ بِقَوْلِ سُفْيَانَ ؟، قَالَ: نَعَمْ.
Sufyan Thawri said: Muddy (cloudy water) and yellowish discharge during the days of menstruation will be considered as menstruation, and after the days of menstruation, any muddy blood or yellowish discharge will be considered as istihada (irregular bleeding). Imam Darimi, may Allah have mercy on him, was asked: Do you accept Sufyan's statement? He replied: Yes.