'Seventh Year' in the Bible

Beware that there be not a wicked 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 givest him nought; and he cry against thee to Jehovah, and it be sin in thee.

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