أَخْبَرَنَا مُحَمَّدُ بْنُ يُوسُفَ ، قَالَ : قَالَ سُفْيَانُ :" الطُّهْرُ خَمْسُ عَشْرَةَ "

Muhammad ibn Yusuf informed us, saying: Sufyan said: “Purity is fifteen days.”