'Seventh Year' in the Bible

Beware that there not be a base thought in your heart, saying, "The seventh year, the year of release, is at hand"; and your eye be evil against your poor brother, and you give him nothing; and he cry to the LORD against you, and it be sin to you.

If your brother, a Hebrew man, or a Hebrew woman, is sold to you, and serves you six years; then in the seventh year you shall let him go free from you.