The term 'I saw ___ sawing wood' is solved by the word 'Esau', which is a four-letter word. Esau is a figure in the Bible, who was the twin brother of Jacob and the son of Isaac and Rebekah. He is known for his skill in hunting and for being a man of the outdoors. This phrase is likely referring to the story in the Bible where Esau is described as coming in from the fields, exhausted, and sawing wood.