John Gill's Bible Commentary Ver. 3. And the angel of the Lord appeared unto the woman , etc.] According to Josephus f266 , it was in a plain without the city; and that he appeared in the form of a man is certain from ( Judges 13:6) but was not a mere man, a prophet of the Lord, nor a created angel, but the uncreated one, the Angel of the covenant, the Son and Word of God, who often appeared in an human form; since his name is said to be “Wonderful”, and he to do wonderful things, and is called “Jehovah”, ( Judges 13:18,23), and said unto her, behold now, thou art barren, and bearest not ; barren at that time, and so she had been ever since she was married to that time; and this is observed, that it might appear the more wonderful that she should after this have a child: but thou shalt conceive, and bear a son ; which to do, must be ascribed to divine power, that one in her circumstances should bear a son; as the prediction of it was owing to divine omniscience, and a proof of it.
Matthew Henry Commentary
Verses 1-7 - Israel did evil: then God delivered them again into the hands of the Philistines. When Israel was in this distress, Samson was born. Hi parents had been long childless. Many eminent persons were born of suc mothers. Mercies long waited for, often prove signal mercies; and by them others may be encouraged to continue their hope in God's mercy The angel notices her affliction. God often sends comfort to his people very seasonably, when they feel their troubles most. This deliverer of Israel must be devoted to God. Manoah's wife was satisfied that the messenger was of God. She gave her husband a particular account, bot of the promise and of the precept. Husbands and wives
should tell eac other their experiences of 
