Judges 13:5

For, lo, thou shalt conceive, and bear a son; and no rasor 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.

Thou shalt conceive, and bear a son. This predicted child being to be a Nazarite, the mother was, for the sake of her promised offspring, required to practice the rigid abstinence of the Nazarite law (see the note at Numbers 6:3).

He shall begin to deliver Israel - a prophecy encouraging to a patriotic man; the terms of it, however, indicated that the period of deliverance was still to be distant.