Rashi on Leviticus 25:41/רש"י על ויקרא כ״ה:מ״א

1הוא ובניו עמו [AND HE SHALL GO AWAY FROM THEE] BOTH HE AND HIS CHILDREN WITH HIM — Rabbi Simeon asked: If he sold himself who sold his children that Scripture has to state they shall leave the master together with him? But we may learn from this that the master is bound to provide his (the servant’s) children with food (Kiddushin 22a; cf. Rashi on Exodus 21:3) although they are not his slaves.

2ואל אחזת אבתיו AND UNTO THE POSSESSION OF HIS FATHERS [SHALL HE RETURN] — This means, he shall return to the dignity held by his ancestors and people shall not hold him in low esteem because of this (because he had previously been a slave);

3אחזת thus means as much as חזקת “the status of” (Makkot 13a).