New Living Translation
But if the slave’s owner arranges for her to marry his son, he may no longer treat her as a slave but as a daughter.

American Standard Version
And if he espouse her unto his son, he shall deal with her after the manner of daughters.

Berean Study Bible
And if he chooses her for his son, he must deal with her as with a daughter.

Douay-Rheims Bible
But if he have betrothed her to his son, he shall deal with her after the manner of daughters.

English Revised Version
And if he espouse her unto his son, he shall deal with her after the manner of daughters.

King James Bible
And if he have betrothed her unto his son, he shall deal with her after the manner of daughters.

World English Bible
If he marries her to his son, he shall deal with her as a daughter.

Young's Literal Translation
'And if to his son he betroth her, according to the right of daughters he doth to her.

Exodus 21:9 Additional Translations ...