'Seventh Year' in the Bible

Beware that there be not a base thought in thy heart, saying, The seventh year, the year of release, is at hand; and thine eye be evil against thy poor brother, and thou give him nought; and he cry unto Jehovah against thee, and it be sin unto thee.

If thy brother, a Hebrew man, or a Hebrew woman, be sold unto thee, and serve thee six years; then in the seventh year thou shalt let him go free from thee.