Umar said: Is one amongst us permitted to sleep in a state of impurity (i. e. after having sexual intercourse)? He (the Holy Prophet) said: Yes, after performing ablution.
يَا رَسُولَ اللَّهِ أَيَرْقُدُ أَحَدُنَا وَهُوَ جُنُبٌ قَالَ نَعَمْ إِذَا تَوَضَّأَ