The angel of Yahweh did not appear again to Manoah and his wife. Then Manoah knew that he had been the angel of Yahweh.
In context
19So Manoah took the young goat, together with the grain offering, and offered it on the rock to Yahweh, who did a wondrous thing while Manoah and his wife looked on. 20As the flame went up from the altar toward heaven, the angel of Yahweh went up in the flame of the altar, while Manoah and his wife watched. They fell facedown on the ground. 21The angel of Yahweh did not appear again to Manoah and his wife. Then Manoah knew that he had been the angel of Yahweh. 22Manoah said to his wife, “We are certainly going to die, for we have seen God.” 23But his wife said to him, “If Yahweh had meant to kill us, he would not have accepted a burnt offering and a grain offering from our hands, or shown us all these things, or told us anything like this now.”