2 Kings 8:10

And Elisha said unto him, Go, say unto him, Thou mayest certainly recover: howbeit the Lord hath shewed me that he shall surely die.

Cross-reference

2 Kings 8:14 shows Hazael reporting only the recovery part, hiding the death prophecy — key step in the deception leading to murder.

2 Kings 1:4 has Elijah similarly pronounce 'you will certainly die' to Ahaziah — a parallel prophetic death sentence to a king.

Amos 3:7 states the principle that God reveals his secrets to prophets, explaining the authority behind Elisha's revelation.

Genesis 3:4 has the serpent say 'you will not certainly die' — the opposite claim to Elisha's true death prophecy.