The Israelites again did what was evil in the sight of the Lord, and the Lord gave them into the hand of the Philistines forty years.
There was a certain man of Zorah, of the tribe of the Danites, whose name was Manoah. His wife was barren, having borne no children.
And the angel of the Lord appeared to the woman and said to her, "Although you are barren, having borne no children, you shall conceive and bear a son.
Now be careful not to drink wine or strong drink, or to eat anything unclean,
for you shall conceive and bear a son. No razor is to come on his head, for the boy shall be a nazirite to God from birth. It is he who shall begin to deliver Israel from the hand of the Philistines."
References for Judges 13:5
Then the woman came and told her husband, "A man of God came to me, and his appearance was like that of an angel of God, most awe-inspiring; I did not ask him where he came from, and he did not tell me his name;
References for Judges 13:6