Parashas Behar · Aliyah 7 · Passuk 25:47
Chabad.org — English translation + Rashi
Torah Temimah cites Sifra (Torat Kohanim).
English: “Or to the offshoot of a stranger’s family.” This refers to one sold to an idolater.
Classical derasha (Sifra).
“Offshoot of a stranger’s family” is understood as sale into the household of an idolater; special urgency attaches to redeeming such a person.