Judges 13:16 in the King James Version
And the angel of the LORD said unto Manoah, Though thou detain me, I will not eat of thy bread: and if thou wilt offer a burnt offering, thou must offer it unto the LORD. For Manoah knew not that he was an angel of the LORD.
Context
15 Manoah said to the LORD’s angel, “Please stay with us, that we may make a young goat ready for you.”
16 The LORD’s angel said to Manoah, “Though you detain me, I won’t eat your bread. If you will prepare a burnt offering, you must offer it to the LORD.” For Manoah didn’t know that he was the LORD’s angel.
17 Manoah said to the LORD’s angel, “What is your name, that when your words happen, we may honor you?”