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.
abudawud:130Musaddad > ʿAbdullāh b. Dāwud > Sufyān b. Saʿīd > Ibn ʿAqīl > al-Rubayyiʿ

The Prophet ﷺ wiped his head with water which was left over in his hand.  

أبو داود:١٣٠حَدَّثَنَا مُسَدَّدٌ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ دَاوُدَ عَنْ سُفْيَانَ بْنِ سَعِيدٍ عَنِ ابْنِ عَقِيلٍ عَنِ الرُّبَيِّعِ

أَنَّ النَّبِيَّ ﷺ مَسَحَ بِرَأْسِهِ مِنْ فَضْلِ مَاءٍ كَانَ فِي يَدِهِ