It was narrated from (Aws bin) Abi Aws that his grandfather said:

"I saw the Messenger of Allah ﷺ trickle water into his hand until it started to drip from his hand, three times."

أَخْبَرَنَا حُمَيْدُ بْنُ مَسْعَدَةَ، عَنْ سُفْيَانَ، - وَهُوَ ابْنُ حَبِيبٍ - عَنْ شُعْبَةَ، عَنِ النُّعْمَانِ بْنِ سَالِمٍ، عَنِ ابْنِ أَبِي أَوْسٍ، عَنْ جَدِّهِ، قَالَ رَأَيْتُ رَسُولَ اللَّهِ ﷺ اسْتَوْكَفَ ثَلاَثًا .