The parallel passages of the annunciation of Samson's birth

The parallel passages of the annunciation of Samson's birth reveal that it is through his death that he will deliver israel. If you look at the passages that part doesn't repeat in both:

Judges 13:5 (KJV) 5 For, lo, thou shalt conceive, and bear a son; and no razor shall come on his head: for the child shall be a Nazarite unto God from the womb: and he shall begin to deliver Israel out of the hand of the Philistines.

Judges 13:7 (KJV) 7 But he said unto me, Behold, thou shalt conceive, and bear a son; and now drink no wine nor strong drink, neither eat any unclean [thing]: for the child shall be a Nazarite to God from the womb to the day of his death.

Part 1: and he shall begin to deliver Israel out of the hand of the Philistines.

Part 2: to the day of his death.

Another observation is that the day his head was shaved was the same day or around the same time that he died.