Musnad Abu Ya'la al-Mawsili 155:362

'Abd al-Ghaffar ibn 'Abd Allah ibn al-Zubayr narrated to us, 'Ali ibn Mushir narrated to us, from Sa'd ibn Tariq, from Abu Hazim, from Abu Hurayrah, who said: The Messenger of Allah (ﷺ) said: "The adornment of the people of Paradise reaches where the ablution (wudu) reaches." And that is because Abu Hurayrah performed ablution one day, and he extended the ablution up to his armpit.