Numbers 6:4

All the days of his separation he shall eat nothing that is produced by the grapevine , not even the seeds or the skins .

As long as they remain under their Nazirite vow, they must not eat anything that comes from the grapevine, not even the seeds or skins.

All the days of his separation shall he eat nothing that is made of the vine tree, from the kernels even to the husk.