The handshake to seal the agreement of the rabbis that he will not stand within four cubits of Breslov and he will not learn the book of Breslov.
They received a handshake, that he will not speak with me, that he will not be Breslov. He gave a handshake. He told me, I said to him, “what did you do? Why did you do this?” he said to me, “this does not apply not by oath and not by vow! If someone makes a vow to desecrated Shabbos, the oath does not apply and neither the vow.”