Psalm 16:10 (ESV) … “For you will not abandon my soul to Sheol, or let your holy one see corruption.”
To delight in the Lord and His goodness and then lose all these blessings at death would be a great tragedy. “If in this life only we have hope in Christ, we are of all men the most pitiable” (1 Cor. 15:19, nkjv). But in His death and resurrection, Jesus has conquered death, and through faith in Him we have a “living hope” (1 Peter 1:3ff).
When David wrote “My body will rest secure” (v. 9, nasb), he was referring to Messiah and not to himself. Using these verses, Peter proved that Jesus had been raised from the dead, for it’s obvious that David was dead and his body had decayed in his tomb (Acts 2:22–31). But Jesus did not see corruption! When He arose from the dead on the third day, He had a real and substantial body, but it was a glorified body that could ingest food (Luke 24:36–42) but was also able to appear and disappear (Luke 24:28–31) and pass through locked doors (John 20:19–29).
In verse 10, David could face death with a glad heart and soul, and could rest in the grave in hope, knowing that one day, he, too, would have a new glorified body. Paul used this same text to prove the resurrection of Jesus Christ from the dead (Acts 13:26–39). The full light of revelation about death and resurrection had not yet been revealed in Old Testament times, although there are hints in verses like 17:15 and 73:24–26, but through Jesus Christ, God had brought “life and immortality to light through the gospel” (2 Tim. 1:10).[1]
[1] Wiersbe, W. W. (2004). Be worshipful (1st ed., pp. 67–68). Colorado Springs, CO: Cook Communications Ministries.