Jamieson, Fausset and Brown on Matthew 18:12-13

12-13. How think ye? If a man have an hundred sheep, and one of them be gone astray, &c.--This is another of those pregnant sayings which our Lord uttered more than once. See on the delightful parable of the lost sheep in Lu 15:4-7. Only the object there is to show what the good Shepherd will do, when even one of His sheep is lost, to find it; here the object is to show, when found, how reluctant He is to lose it. Accordingly, it is added,