New Revised Standard Version
Yet we cannot give any of our daughters to them as wives.” For the Israelites had sworn, “Cursed be anyone who gives a wife to Benjamin.”

Contemporary English Version
But we can't let the men of Benjamin marry any of our daughters. We made a sacred promise not to do that, and if we break our promise, we will be under our own curse.

New American Bible
Yet we cannot give them any of our daughters in marriage.” For the Israelites had taken an oath, “Cursed be he who gives a wife to Benjamin!”

Douay-Rheims Bible
For as to our own daughters we cannot give them, being bound with an oath and a curse, whereby we said: Cursed be he that shall give Benjamin any of his daughters to wife.

For as to our own daughters we cannot give them, being bound with an oath and a curse, whereby we said: Cursed be he that shall give Benjamin any of his daughters to wife.

sworn

Judges 21:1 Now the children of Israel had also sworn in Maspha, saying: None of us shall give of his daughters to the children of Benjamin to wife.

Judges 11:35 And when he saw her, he rent his garments, and said: Alas! my daughter, thou hast deceived me, and thou thyself art deceived: for I have opened my mouth to the Lord, and I can do no other thing.