[Machine] Narrated by Prophet Muhammad ﷺ : When one of you wakes up from sleep and wants to perform ablution (washing before prayer), they should not dip their hand into the vessel until they have washed it, as they do not know where their hand has spent the night.
عَنِ النَّبِيِّ ﷺ قَالَ إِذَا اسْتَيْقَظَ أَحَدُكُمْ مِنْ نَوْمِهِ فَأَرَادَ الطُّهُورَ فَلَا يَضَعَنَّ يَدَهُ فِي الْإِنَاءِ حَتَّى يَغْسِلَهَا فَإِنَّهُ لَا يَدْرِي أَيْنَ بَاتَتْ يَدُهُ