Nazir 1:2-3

Nazir 1:2

If a person says that he is a nazir from seeds, grape skins, haircuts or ritual impurity, he is a nazir in every way. If he says that he will be like Samson, or the son of Manoach, or Delilah’s husband, or the one who ripped off the doors of Gaza, or the one who was blinded by the Philistines (all of which are references to Samson), then he is only a nazir like Samson. The difference between a permanent nazir and a nazir like Samson is that if a permanent nazir’s hair gets too heavy, he may lighten it with a razor, bringing three animal sacrifices on that day, and he brings a sacrifice if he is rendered ritually impure. A nazir like Samson may not lighten his hair no matter how heavy it gets and he does not bring a sacrifice if rendered unclean.

Nazir 1:3

If not otherwise specified, nezirus lasts for 30 days. If a person says, “I am a nazir for a large period,” “for a small period,” or even “from now until the end of the world,” he is a nazir for 30 days. If a person says that he is a nazir for one day, for one hour, or for one and a half nezirus periods, he is a nazir for two nezirus periods, i.e., 60 days. If one says, “I am a nazir for 30 days plus one hour,” he is a nazir for 31 days because nezirus is not counted by the hour.