59 Nazir 1/4-7

(4) "I am a Nazirite like the hair of my head," "like the dust of the earth," and "like the sand of the sea" - this one is an eternal Nazirite, and shaves once every thirty days. Rebbi says: this one does not shave once every thirty days. And which [type of Nazirite] shaves once every thirty days? The one who proclaims: "Behold nezirut is upon me like the hair of my head," "like the dust of the earth," and "like the sand of the sea."

(5) "I am a Nazirite as a house-full" or "a box-full", we examine him, if he says, "I became a Nazirite for one large [term]," he will be a Nazirite for thirty days. And if he says, "I simply became a Nazirite," we see the box as if it were full of mustard, and he is a Nazirite for all his days.

(6) "I am a Nazirite from here until such-and-such a place," we calculate how many days from here until that place; if it is less than thirty days, he is a Nazirite for thirty days, and if not, he is a Nazirite for that number of days.

(7) "I am a Nazirite as the number of days of the solar year," he counts [as many terms of] nezirut as the number of days of the solar year. R. Yehuda said: This happened; and when he completed it, he died.