יג רבי יהודה אומר מעברין אמר רבי יהודה מעשה בחזקיה מלך יהודה שעיבר את השנה מפני הטומאה ובקש רחמים על עצמו דכתיב (דברי הימים ב ל, יח) כי מרבית העם רבת מאפרים ומנשה יששכר וזבולון לא הטהרו
13 Our Rabbis taught: We may not, in the current year, intercalate the following year,<span class="x" onmousemove="('comment',' I.e., make the necessary calculations and arrive at the decision to intercalate. So Tosaf. Rashi: One may not intercalate one year instead of the following. Maim. (Yad, Kid. Hahodesh IV, 13) agrees with the former. ');"><sup>22</sup></span> nor intercalate three years in succession. R. Simeon said: It once happened that R. Akiba, when kept in prison,<span class="x" onmousemove="('comment',' Akiba was kept in prison several years before being finally martyred for practising and teaching the Jewish religion. V. Ber. 61b. ');"><sup>23</sup></span> intercalated three years in succession. The Rabbis, however, retorted: 'Is that your proof? The court sat and intercalated each year at its proper time.'<span class="x" onmousemove="('comment',' R. Akiba only made the calculation of the next three leap years, since he was the accepted authority on the computation of the calendar and the Rabbis always employed his aid in this matter, but the leap years were not in three successive years. ');"><sup>24</sup></span> Our Rabbis taught: We may not intercalate a Sabbatical year<span class="x" onmousemove="('comment',' Cf. Lev. XXV, 1-7. So as not to prolong the prohibition against tilling the soil. ');"><sup>25</sup></span> nor the year following a Sabbatical year.<span class="x" onmousemove="('comment',' For the reason that the prohibition of the use of the new produce would be prolonged. ');"><sup>26</sup></span> But which year was it usual to intercalate? — That preceding the Sabbatical year.<span class="x" onmousemove="('comment',' To give an additional month for working the soil. ');"><sup>27</sup></span> Those of the House of Rabban Gamaliel, however, used to intercalate the year following the Sabbatical year.<span class="x" onmousemove="('comment',' They did not apprehend a shortage of provisions during the Sabbatical year, since importation from outside Palestine, which they held permissible (cf. Ned. 53b, and below), would prevent it. ');"><sup>28</sup></span> And this enters into the dispute of the following Tannaim. For it has been taught: Herbs may not be imported from outside the land [of Israel]. But our Rabbis permitted it.<span class="x" onmousemove="('comment',' V. n. 7. ');"><sup>29</sup></span> Wherein do they differ? — R. Jeremiah said: They differ as to whether we apprehend lest the earth attached to them [should also be imported].<span class="x" onmousemove="('comment',' Foreign soil was declared unclean. V. Shab. 14b. ');"><sup>30</sup></span> Our Rabbis taught: We may not intercalate a year because of uncleanness.<span class="x" onmousemove="('comment',' Even if it should involve the risk of offering the Paschal lamb in uncleanness. E.g. if the Nasi were dangerously ill, and it was judged that he would die less than a week before Passover, in which case the community, by attending the obsequies in his honour, would become unclean. (Rashi). Cf. Pes. 66b. ');"><sup>31</sup></span> R. Judah said: We may intercalate. R. Judah observed: It once happened that Hezekiah king of Judah declared a leap year because of uncleanness, and then prayed for mercy, for it is written, For the multitude of the people, even many of Ephraim and Manasseh, Issachar and Zebulun had not cleansed themselves,