Charles Ellicott Commentary Exodus 21:11

"And if he do not these three things unto her, then shall she go out for nothing, without money." — Exodus 21:11 (ASV)

These three — that is, one of these three things:

1. Marry her himself;
2. Marry her to his son; or
3. Transfer her, on the terms on which he received her, to another Hebrew.