פירוש על יחזקאל 1:2

that is the fifth year of King Jehoiachin’s exile Thus, we may deduce that the thirty years he counted, he counted from the beginning of the jubilee [cycle]: the last jubilee commenced at the beginning of the eighteenth year of Josiah[‘s reign]; that is, the year that Hilkiah found the scroll (II Kings 22). So we learn in Seder Olam (ch. 26), that the beginning of the jubilee was that [year]. Josiah reigned thirty one years. Subtracting from them the seventeen years that had already passed leaves fourteen years. Jehoiakim reigned eleven years; [together, that] totals twenty-five years. Jeconiah [Jehoiachin] his son, had reigned only three months when he was exiled, and the year that Ezekiel prophesied was the fifth [year] of his exile, hence the thirtieth year of the jubilee. And so we find that at the end of his prophecy, he gives a sign using the count of the jubilee [as a reference], for it says (40:1): “In the twenty-fifth year of our exile, at the beginning of the year, on the tenth of the month.” Our Rabbis said (Arachin 12a): What “year” is it that begins on the tenth of the month? You must say that this is the jubilee year [See Leviticus 25:9f.].