(a) It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he performed ablution; then he took a handful of water, then sprinkled it on his left foot, then said: "This is how I saw the Messenger of Allah (peace and blessings be upon him) performing ablution."
(b) In the narration of Abu Salamah al-Khuza'i (may Allah have mercy on him): He (Ibn Abbas) took a handful of water, then sprinkled it on his right foot and washed it, then took another handful and washed his left foot with it, then said: "This is how I saw the Messenger of Allah (peace and blessings be upon him) performing ablution."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 343