Charles Ellicott Commentary Judges 13:14

"She may not eat of anything that cometh of the vine, neither let her drink wine or strong drink, nor eat any unclean thing; all that I commanded her let her observe." — Judges 13:14 (ASV)

The object of this message seems to have been only to give certainty to Manoah.

Anything that comes from the vine. —In Numbers 6:3-5 it is emphatically added, “He shall separate himself from wine ... and shall drink no vinegar of wine ... neither shall he drink any liquor of grapes, nor eat moist grapes or dried. All the days of his separation shall he eat nothing that is made of the vine, from the kernels even to the husk.”