What does the Bible say about the concept of Sabbath?

The Sabbath is introduced in Genesis 2:1-3 when God rested on the seventh day after creating the heavens and the earth. This day's significance extends beyond mere physical rest; it symbolizes completion and perfection, ultimately pointing to Christ as our true rest and fulfillment. The Sabbath is not merely a day but represents the finished work of salvation seen in Jesus Christ, who has declared 'It is finished.' This correlation between Sabbath and Christ highlights that our true rest is found not in observing a day, but in resting in the atonement and grace offered through Him.