Hadith #35 (Jami' al-Tirmidhi)
Book: The Book on Purification
Narrator(s): Abdullah bin Wahb عبد الله بن وهب بن مسلم القرشي, Abdullah bin Zayd Mazni, al-Harith bin Y'aqub الحارث بن يعقوب, Ali bin Khashram علي بن خشرم, Amr bin al-Harith bin Ya'qub عمرو بن الحارث

he saw the Prophet performing Wudu, and that he wiped his head with water that was not left over from his hands.

Source: https://parallelquran.com/hadith/jami-al-tirmidhi-35/