The Sabbath was not invented because humans were overworked. It was woven into the creation order before any human had done a single thing. Genesis 2:2–3 records God resting on the seventh day and blessing that day — making it holy. The Sabbath is not a recovery mechanism for a broken world. It is a built-in feature of a good one. Rest is not the exception; it is the structure.
Hebrews 4:9–10 extends this into the New Covenant: "There remaineth therefore a rest to the people of God." The Greek word here is sabbatismos — Sabbath-rest. Not just cessation of activity, but the quality of rest that belongs to the people of God. The writer's argument is that this rest is still available and still being entered by those who cease from their own works as God ceased from his.
Jesus' invitation in Matthew 11:28–29 is unique in the Gospels because he does not promise rest as a reward. He says "ye shall find rest unto your souls" — the finding happens in the coming and the learning, not in completing something. Mark 6:31 shows that Jesus himself modeled withdrawal: "Come ye yourselves apart into a desert place, and rest a while." Rest was not a concession for the disciples. It was a command from Jesus.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.