Mark 5:19
Howbeit Jesus suffered him not, but saith unto him, Go home to thy friends, and tell them how great things the Lord hath done for thee, and hath had compassion on thee.
Cross-reference
Psalm 66:16 echoes the same call to declare God's deeds — 'let me tell you what he has done for me'.
Daniel 4:1-3 shows Nebuchadnezzar proclaiming God's wonders after restoration — parallels the man's call to testify.
Daniel 6:25-27 records Darius declaring God's rescue of Daniel — a parallel to the healed man's deliverance testimony.
John 4:29 shows the Samaritan woman testifying about Jesus — mirrors the healed man's mission to declare what the Lord did.
Luke 8:38 parallels this exact moment: the healed man begs to stay but is sent to declare God's work. It's a direct parallel account of the same event.
In Acts 22, Paul repeatedly tells his conversion story — a parallel to the man's commission to declare what the Lord has done. Both are personal testimonies of divine intervention.
Isaiah 38:9-20 records Hezekiah's thanksgiving for healing — a similar testimony of God's mercy.