Who knows one hundred twenty-eight?
Please cite/link your sources, if possible. At some point at least twenty-four hours from now, I will:
Upvote all interesting answers.
Accept the best answer.
Go on to the next number.
128 are the days from זמן שמחתנו until מרבין בשמחה (in Israel (where שמ״ע is one day) in a "full" year).
128 years separate the first imprisonment (and release) of a Chabad Rebbe from the last. The first - R' Shneur Zalman of Liadi, released from prison on the 19th of Kislev 5559 (1798); the last - R' Yosef Yitzchak, released from prison on the 12th of Tammuz 5687 (1927).
128 years also separate the passing of the two Chabad Rebbes who were namesakes: the Tzemach Tzedek, 13th of Nissan 5626 (1866), and the last Rebbe, 3rd of Tammuz 5754 (1994).
128 were the people of Anasos, and also the descendants of Asaf, who went to Y'rushalayim, as listed in Ezra chapter 2.