مسند امام احمد بن حنبل · Hadith 2417

It was narrated from Ibn 'Abbas (RA) that he did wudoo': he washed his face, then he took a handful of water and rinsed his mouth and nose with it. Then he took a handful of water and did this to it - i.e., he scooped it with two hands - and he washed his face with it. Then he took a handful of water and washed his right arm with it. Then he took a handful of water and washed his left arm with it. Then he wiped his head; then he took a handful of water and sprinkled it on his right foot until he washed it, then he took another handful and washed his left foot with it. Then he said: This is what I saw the Messenger of Allah (PBUH) do.