The angel of Yahweh said to Manoah, Though you detain me, I won't eat of your bread; and if you will make ready a burnt offering, you must offer it to Yahweh. For Manoah didn't know that he was the angel of Yahweh.
thou wilt offer a burnt offering, thou must offer it unto the Lord; if he meant to provide not a festival entertainment, but a sacrifice, then he should take care that he did not offer it to strange gods, as was now very much the custom with Israel in this their time of apostasy,