مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 439
Purification
Washing - Section 1
وَعَنْ أَنَسٍ قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَتَوَضَّأُ بِالْمُدِّ وَيَغْتَسِلُ بِالصَّاعِ إِلَى خَمْسَةِ أَمْدَادٍ
Anas said that the Prophet (ﷺ) used to perform ablution with a mudd of water and wash with a sa‘ up to five mudds. (Bukhari and Muslim.)
Mishkat al-Masabih, 439مُتَّفَقٌ عَلَيْهِ (الألباني)