Nazir 54 - Not to shave!
However, from the Torah point of view, accidentally touching a bone is unlikely because a plow does not usually reach that deep, and the person is really pure. A nazir who becomes impure should cut his hair and bring sacrifices, but a nazir who is pure is not allowed to touch even one hair. What is a nazir to do if he passes through a "field full of fragments," as it is called?
Here is what he should do: purify himself with the ashes of the red heifer on days three and seven, and then continue being a nazir. The seven days of his impurity are removed from his count, but otherwise, he continues to count as before. And he does not shave his hair or bring sacrifices because, in truth, he is pure. Other similar cases, such as being under the same branch as a corpse (but not a real roof that transmits impurity) are treated the same way.
If, in addition to being a nazir, he became a metzora (spiritual leper), he purifies himself from that but continues being a nazir since metzora, even though it requires purification, is not the same as the impurity of the dead. Thus, he does not lose all the previous days, as he would if we were to go to a cemetery.
Art: Plowing ox By Rudolf Koller
