Matthew 18:12
What do you think? If a man has a hundred sheep, and one of them has gone astray, does he not leave the ninety-nine on the mountains and go in search of the one that went astray? The lost-sheep parable in Matthew's Community Discourse (contrast Luke 15's version which addresses the Pharisees' complaint about Jesus eating with sinners): the shepherd who leaves the ninety-nine to seek the one strayed sheep is the image of the community's care for the brother who has gone astray.