Abdullah bin Ka'b or Abdur Rahman bin Ka'b (Hisham bin Urwah was unsure) reported, their father Sayyiduna Ka'b bin Malik (may Allah be pleased with him) narrated that the Noble Prophet (peace and blessings be upon him) used to eat with three fingers, and when he finished eating, he would lick them. Hisham bin Urwah indicated towards the three fingers to explain.