'Year of Release' in the Bible

Take heed to thee lest there be a word in thy heart -- worthless, saying, Near is the seventh year, the year of release; and thine eye is evil against thy needy brother, and thou dost not give to him, and he hath called concerning thee unto Jehovah, and it hath been in thee sin;

and Moses commandeth them, saying, 'At the end of seven years, in the appointed time, the year of release, in the feast of booths,