The kinsman-redeemer replied, "I cannot redeem it myself, or I would jeopardize my own inheritance. Take my right of redemption, because I cannot redeem it."

Leviticus 25:25
If your brother becomes impoverished and sells some of his property, his nearest of kin may come and redeem what his brother has sold.

Deuteronomy 25:7
But if the man does not want to marry his brother's widow, she is to go to the elders at the city gate and say, "My husband's brother refuses to preserve his brother's name in Israel. He is not willing to perform the duty of a brother-in-law for me."

And the kinsman said, I cannot redeem it for myself, lest I mar my own inheritance: redeem you my right to yourself; for I cannot redeem it.