John Gill Commentary 2 Kings 8:4

"Now the king was talking with Gehazi the servant of the man of God, saying, Tell me, I pray thee, all the great things that Elisha hath done." — 2 Kings 8:4 (ASV)

And the king talked with Gehazi the servant of the man of God ,
&c.] Elisha's servant, just at the same time the woman made her application to him; so that this was before he was dismissed from the service of the prophet, and consequently before the affair of Naaman's cure, and so before the siege of Samaria:

saying, tell me, I pray you, all the great things that Elisha has
done ;
the miracles he wrought, as the dividing of the waters of Jordan, and healing those near Jericho; the affair of procuring water for the armies of the three kings in Edom he needed not to relate, since Jehoram was an eyewitness thereof; the next was the multiplying the widow's cruse of oil, when he in course came to those that were done for the Shunammite woman.