Combining the Prohibited items for the legal limit, if consumed one after another (within "the Time needed to Consume a Peras"-Lechem Mishneh Hil. Nezirut 5:3): Pesachim 45a
Whether the Nazir violated his vow if he declared it while eating a grape product: Nedarim 4a
Punishment for consuming grape products: Pesachim 41b; Makkot 21a
A Nazirite is forbidden to consume wine: Pesachim 23a