He will surely come out to me - In the East a code of unwritten laws prescribes exactly how visits are to be paid, and how visitors are to be received, according to the worldly rank of the parties (compare 2 Kings 5:21). No doubt, according to such a code, Elisha should have gone out to meet Naaman at the door of his house.
And call on the name of the Lord his God - literally, “of Yahweh his God.” Naaman is aware that Yahweh is the God of Elisha. Compare the occurrence of the name of Yahweh on the “Moabite Stone” (2 Kings 3:4 note).
Strike - Better, as in the margin, “pass the fingers up and down the place” at a short distance. It seems implied that the leprosy was partial.