The angel of Yahweh appeared to the woman, and said to her, See now, you are barren, and don't bear; but you shall conceive, and bear a son.
Samson’s mother was to observe certain precautions during her pregnancy to safeguard her special child (cf. Hebrews 11:23 NIV). "Wine" came from grapes, but "strong drink" (Heb. shakar) was the product of other fermented fruits and grains. We know that the physical condition of a pregnant woman can affect her unborn child. For example, heroin addicts bear babies that need that drug. God did not want Samson under any other influence except Himself, even from his conception.