The seventh-day rest commanded at creation (Gen 2:2-3), codified in the fourth commandment (Ex 20:8-11), fulfilled and reframed in Christ (Heb 4:9-11). The Hebrew shabbat (cease, rest) names both the day and the disposition. The OT Sabbath was a holy convocation on the seventh day, marked by cessation from work, observance of holy assembly, and the memory of God's rest from creation and Israel's deliverance from Egypt (Deut 5:15). The NT shifts the locus to the Lord's Day (the first day of the week, Rev 1:10), the day of Christ's resurrection (Matt 28:1), and applies the deeper Sabbath as the rest of faith in Hebrews 4. The Christian Sabbath is not legalistic Pharisee-style restriction; it is the weekly enactment of the rest the gospel has accomplished — cessation from striving, gathering for worship, and the anticipation of the eternal Sabbath still to come.