'Year of Release' in the Bible

Beware that there be not a thought in thy wicked heart, saying, The seventh year, the year of release, is at hand; and thy eye shall be evil against thy poor brother, and thou shalt give him naught; and he shall cry to the LORD against thee, and it shall be sin to thee.

And Moses commanded them, saying, At the end of every seven years, in the solemnity of the year of release, in the feast of tabernacles,