Judg 13:3-5

3And 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.4Now be careful not to drink wine or strong drink, or to eat anything unclean,5for 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.”