Rashi on Leviticus 25:26/רש"י על ויקרא כ״ה:כ״ו

1ואיש כי לא יהיה לו גואל [AND] IF [A MAN] HAVE NONE TO REDEEM IT — But does there exist anyone in Israel who has none to redeem his property (who has no relative at all)? But the meaning is: a relative who is able (possesses the means) to redeem that which he has sold (Sifra, Behar, Chapter 5 2; cf. Kiddushin 21a).