Leviticus 25:52

If there are only a few years left until the year of jubilee, he must take them into account. He must refund from his purchase price an amount equal to those years.

Treasury of Scripture Knowledge

Summary

And if there remain but few years unto the year of jubile, then he shall count with him, and according unto his years shall he give him again the price of his redemption.

Bible References

General references

Leviticus 25:27
you must pay enough to make up for what the present owner will lose on it before the next Year of Celebration, when the property would become yours again.
Leviticus 27:18
Should you give the field after the jubilee year, the priest will estimate its value based on the number of years left until the next jubilee year.
Luke 4:19
To proclaim the acceptable year of Jehovah. (Isaiah 61:1)