What does the Bible say about resting in Christ for salvation?

The entirety of Hebrews 10 emphasizes the superiority of Christ's once-for-all sacrifice over the repeated sacrifices of the Old Testament priests, pointing to the necessity of resting in His completed work. Only Christ's sacrifice can take away sins, as every other effort, including our works or sacrifices, is insufficient. This concept of resting means ceasing from our own efforts to attain righteousness and instead trusting solely in the righteousness provided through Christ. Romans 8 also reinforces this by illustrating that those who are spiritually minded, resting in Christ, find life and peace, while those striving in the flesh cannot please God.