Parashas Behar · Aliyah 6 · Passuk 25:40
Chabad.org — English translation + Rashi
Torah Temimah cites Sifra / Kiddushin 15a.
English: “Until the year of the Yovel he shall work with you.” This teaches that the Yovel releases him to freedom.
Classical derasha (Sifra / Bavli Kiddushin).
An eved ivri goes free at Yovel even if the six-year term has not yet expired (and even if he is a nirtza).