Jubilee Year is given in Leviticus 25:

Leviticus 25:8. “And you will number seven Sabbaths of years for yourself, seven times seven years: and the space of the seven Sabbaths of years will be forty-nine years for you. 9. Then you will sound the shofar on the tenth of the seventh month, on the Day of Atonement you will sound the horn throughout all your land. 10. And you will sanctify the fiftieth year and proclaim liberty throughout the entire land to all its inhabitants. It will be a jubilee for you and you will return his possession to each man, and you will return each man to his family. 11. That fiftieth year will be a jubilee to you. You will not sow or reap that which grows of itself in it, or gather the grapes of your undressed vine. 12. For it is the jubilee; it will be holy to you. You will eat the increase of it out of the field. 13. In the year of this jubilee you will return each man to his possession. 14. And if you sell anything to your neighbor, or buy anything of your neighbor’s hand, you will not oppress one another. 15. According to the number of years after the jubilee you will buy from your neighbor, and according to the number of years of the fruits he will sell to you. 16. According to the multitude of years you will increase its price, and according to the fewness of years you will diminish its price: for according to the number of the years of the fruits he sells to you. 17. You will therefore not oppress one another, but you will revere your God, for I AM the LORD* your God. 18. So you will do My statutes and keep My judgments, and do them and you will live in the land in safety. 19. And the land will yield its fruit and you will eat your fill and live in it in safety. 20. And if you will say, What will we eat the seventh year? Behold, we will not sow or gather in our increase. 21. Then I shall command My blessing upon you in the sixth year and it will bring forth fruit for three years. 22. And you will sow the eighth year and eat of old fruit until the ninth year, until her fruits come in you will eat of the old store. 23. The land will not be sold forever, for the land is Mine, for you are strangers and sojourners with Me. 24. And in all the land of your possession you will grant a redemption for the land.