Jamieson, Fausset and Brown on Judges 13:15

Jud 13:15-23. Manoah's Sacrifice.

15. Manoah said unto the angel ..., I pray thee, let us detain thee, until we shall have made ready a kid--The stranger declined the intended hospitality and intimated that if the meat were to be an offering, it must be presented to the Lord [Jud 13:6]. Manoah needed this instruction, for his purpose was to offer the prepared viands to him, not as the Lord, but as what he imagined him to be, not even an angel (Jud 13:16), but a prophet or merely human messenger. It was on this account, and not as rejecting divine honors, that he spoke in this manner to Manoah. The angel's language was exactly similar to that of our Lord (Mt 19:17).