'Prepare' in the Bible

Manoah responded to the angel of the LORD, "Please, let us detain you while we prepare a young goat for you."

The angel of the LORD answered Manoah, "If you detain me, I won't be eating your food, but if you prepare a burnt offering, you'll be making a sacrifice to the LORD." The angel of the LORD said this because Manoah didn't know that he was the angel of the LORD.