Beware that there be not a thought in thy wicked heart, saying, The seventh year, the year of release, is at hand; and thine eye be evil against thy poor brother, and thou givest him nought; and he cry unto the Lord against thee, and it be sin unto thee. (15:9)

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, (31:10)