Parashas Behar · Aliyah 6 · Passuk 25:42
Chabad.org — English translation + Rashi
Torah Temimah cites Sifra / Kiddushin 22b.
English: “For they are My servants.” They are My servants — and not servants to servants.
Classical derasha (Sifra / Bavli Kiddushin).
Because Israel are servants of God, they may not be sold in the permanent manner of Canaanite slaves; their ultimate service belongs to God alone.