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.
nasai:426Muḥammad b. ʿAbd al-Aʿlá > Khālid > Shuʿbah > Mukhawwal > Abū Jaʿfar > Jābir

"When the Messenger of Allah ﷺ performed Ghusl, he would pour water on his head three times."  

النسائي:٤٢٦أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى قَالَ حَدَّثَنَا خَالِدٌ عَنْ شُعْبَةَ عَنْ مُخَوَّلٍ عَنْ أَبِي جَعْفَرٍ عَنْ جَابِرٍ قَالَ

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا اغْتَسَلَ أَفْرَغَ عَلَى رَأْسِهِ ثَلاَثًا  


See similar narrations below:

Collected by Bukhārī
bukhari:255Muḥammad b. Bashhār > Ghundar > Shuʿbah > Mikhwal b. Rāshid > Muḥammad b. ʿAlī > Jābir b. ʿAbdullāh

The Prophet ﷺ used to pour water three times on his head.  

البخاري:٢٥٥حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ قَالَ حَدَّثَنَا غُنْدَرٌ قَالَ حَدَّثَنَا شُعْبَةُ عَنْ مِخْوَلِ بْنِ رَاشِدٍ عَنْ مُحَمَّدِ بْنِ عَلِيٍّ عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ قَالَ

كَانَ النَّبِيُّ ﷺ يُفْرِغُ عَلَى رَأْسِهِ ثَلاَثًا