30. Fasting
٣٠۔ كتاب الصوم
One may begin to fast even in a state of ritual impurity
At times Messenger of Allah ﷺ used to get up in the morning in the state of Janaba after having sexual relations with his wives. He would then take a bath and fast.
أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُدْرِكُهُ الْفَجْرُ وَهُوَ جُنُبٌ مِنْ أَهْلِهِ ثُمَّ يَغْتَسِلُ وَيَصُومُ