Nedarim

GEMARA. IF A MAN SAYS TO HIS WIFE, 'KONAM BE THE WORK OF YOUR HANDS TO ME,' 'FOR MY MOUTH,' OR 'TO MY MOUTH, etc.' Ishmael, of Kefar yama,  — others say, Kefar Dima  — propounded  the case of an onion that has been pulled up in the seventh year and planted in the eighth, and its growth exceeds the stock. And this is what he asked: The growth is permitted, whilst the stock is forbidden:  but since the growth exceeds the stock, the permitted growth comes and annuls what is forbidden;  or is it not so?  He came before R. Ammi, and he could not solve it. He then went before R. Isaac the smith,  who solved it from the following dictum of R. Hanina of Torata  in R. Jannai's name: If one plants an onion of terumah, and its increase exceeds the stock, it is [all] permitted.  Said R. Jeremiah, others state, R. Zerika, to him, Do you abandon two and follow one? Now who are the two? — [i] R. Abbahu, who said in R. Johanan's name: If a young tree  already with fruit is grafted on an old one, even if it multiplies two hundredfold, it [the original fruit] is forbidden.  [ii] R. Samuel son of R. Nahmani said in R. Jonathan's name: If an onion is planted in a vineyard and the vineyard is [subsequently] removed, it [the onion] is forbidden. Then he [Ishmael] again went before R. Ammi, who solved it from the following: For R. Isaac said in R. Johanan's name: If a litra  of onions was tithed  and then planted, the whole of it must be re-tithed.  This proves that the yield nullifies the stock.  Perhaps, however, this is different, being in the direction of greater stringency!  — But [it can be solved] from the following: For it was taught: R. Simeon said: