Jamieson, Fausset and Brown on 2 Kings 5:20-25

20-25. I will run after him, and take somewhat of him--The respectful courtesy to Elisha, shown in the person of his servant, and the open-handed liberality of his gifts, attest the fulness of Naaman's gratitude; while the lie--the artful management is dismissing the bearers of the treasure, and the deceitful appearance before his master, as if he had not left the house--give a most unfavorable impression of Gehazi's character.