John Gill

And she said unto her mistress,.... As she was waiting upon her at a certain time, and perhaps her mistress was lamenting the case of her husband as desperate and incurable: would God my lord were with the prophet that is in Samaria; meaning Elisha, who, though sometimes in one place, and sometimes in another, yet often at Samaria, and it seems was there when this girl was taken captive: for he would recover him of his leprosy; the maid had heard of the miracles wrought by Elisha, and doubted not that at the request of her lord he would be willing, as she believed he was able, to cure him of this disease.