سُنَنُ ابْنِ مَاجَهْ
Sunan Ibn Majah 268
The Book of Purification and its Sunnah
The quantity of water required for ablution and bathing from a state of sexual impurity
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ، عَنْ هَمَّامٍ، عَنْ قَتَادَةَ، عَنْ صَفِيَّةَ بِنْتِ شَيْبَةَ، عَنْ عَائِشَةَ، قَالَتْ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ يَتَوَضَّأُ بِالْمُدِّ وَيَغْتَسِلُ بِالصَّاعِ .
It was narrated that 'Aishah said: "The Messenger of Allah used to perform ablution with a Mudd (of water) and bath with a Sa'."
Sunan Ibn Majah, 268Sahih (Darussalam)