Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:872Abū ʿAbdullāh al-Ḥāfiẓ Fī Ziyādāt al-Fawāʾid > Abū al-ʿAbbās Muḥammad b. Yaʿqūb > al-ʿAbbās b. Muḥammad > Abū ʿĀṣim al-Ḍaḥḥāk b. Makhlad > Ḥanẓalah > al-Qāsim > ʿĀʾishah

[Machine] That the Messenger of Allah ﷺ used to perform ablution (washing) in a container of this size and Abu Asim showed us a container the size of the container in his hand, and it was like a cup that holds eight pounds. Then he would pour water on the right side of his head and then pour water on the left side of his head, and then he would cup his hands and pour water over the middle of his head.  

البيهقي:٨٧٢مَا أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ فِي زِيَادَاتِ الْفَوَائِدِ ثنا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ يَعْقُوبَ ثنا الْعَبَّاسُ بْنُ مُحَمَّدٍ ثنا أَبُو عَاصِمٍ الضَّحَّاكُ بْنُ مَخْلَدٍ عَنْ حَنْظَلَةَ عَنِ الْقَاسِمِ عَنْ عَائِشَةَ

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يَغْتَسِلُ فِي حِلَابٍ قَدْرَ هَذَا وَأَرَانَا أَبُو عَاصِمٍ قَدْرَ الْحِلَابِ بِيَدِهِ فَإِذَا هُوَ كَقَدْرِ كُوزٍ يَسَعُ ثَمَانِيَةَ أَرْطَالٍ ثُمَّ يَصُبُّ عَلَى شِقِّ رَأْسِهِ الْأَيْمَنِ ثُمَّ يَصُبُّ عَلَى شِقِّ رَأْسِهِ الْأَيْسَرِ ثُمَّ يَأْخُذُ بِكَفَّيْهِ فَيَصُبُّ وَسَطَ رَأْسِهِ