Arabic (Original)
وَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا اسْتَيْقَظَ أَحَدُكُمْ مِنْ نَوْمِهِ فَلَا يَضَعْ يَدَهُ فِي الْوَضُوءِ حَتَّى يَغْسِلَهَا إِنَّهُ لَا يَدْرِي أَحَدُكُمْ أَيْنَ بَاتَتْ يَدُهُ.
English Translation
The Messenger of Allah (peace be upon him) said: 'When one of you wakes from sleep, let him not put his hand in the water for ablution until he washes it, for none of you knows where his hand spent the night.'