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If a person says Aha or Aha Na'eh it is a Yad Nezirus. (1)
If a person says that he shall be Nazik, Nazi'ach or Pazi'ach he is a Nazir. (2)
If a person says Hareini ka'Zeh or Hareini Mechalkel or Hareini Mesalsel or Harei Alai Leshale'ach Pera he is a Nazir.
If a person says he will bring birds R. Meir says he is a Nazir and the Chachamim disagree.
It is wine that causes a Sotah to sin.
Anyone who sees a Sotah in her disgrace will become a Nazir.
If someone says Aha, if a Nazir is not passing in front of him it is a Safek whether he means that he wants to fast of if he wants to be a Nazir. (3)
If he says Aha and a Nazir is passing in front of him and he says in his heart that he wants to be a Nazir, he is a Nazir. (3)
A person shall beautify the Mitzvos; one shall have a beautiful Sukah, Lulav, Tzitzis and shall write a beautiful Sefer Torah.
If a Nazir says Aha Na'eh and holds onto his hair he is a Nazir.
A BIT MORE
1. It is only a partial Lashon for Nezirus and Chazal learn out from a Pasuk that a Yad is a sufficient Lashon to make a person into a Nazir.
2. These are regarded as Kinuyei Nezirus which are slang words for Nezirus and it is a sufficient Lashon to make a person into a Nazir.
3. Since it is a Safek he is not a Nazir.
If a person says that He shall be Nazik Nazi'ach or Pazi'ach he is a Nazir because it is Kinuyei Nezirus. According to R. Yochanan Kinuyei Nezirus are foreign words for Nezirus. A person who vows to be a Nazir in any one of the 70 languages is only a Nazir if he understands the language that he is using. However if he says Nazik, Nazi'ach or Pazi'ach he is a Nazir even if he does not understand the language because these Leshonos are similar to Lashon ha'Kodesh. (Tosfos)
If someone bought an Esrog that was the size of an egg which is the minimal Shi'ur for an Esrog and afterwards he finds a bigger Esrog, if the second Esrog is no more than a third more than the price that he paid for the first Esrog it is a Mitzvah to trade in the first Esrog in order to buy the bigger Esrog. According to some opinions if someone has the option of buying two Esrogim and one of them is nicer than the other, if the nicer one does not cost more than an extra third, it is a Mitzvah to buy the nicer one. (Shulchan Aruch OC 656:1)
Next Daf Index to Revach for Maseches Nazir