Luke 15:1-7 NRSV
Now all the tax collectors and sinners were coming near to listen to him. And the Pharisees and the scribes were grumbling and saying, “This fellow welcomes sinners and eats with them.”
So he told them this parable: “Which one of you, having a hundred sheep and losing one of them, does not leave the ninety-nine in the wilderness and go after the one that is lost until he finds it? When he has found it, he lays it on his shoulders and rejoices. And when he comes home, he calls together his friends and neighbors, saying to them, ‘Rejoice with me, for I have found my sheep that was lost.’ Just so, I tell you, there will be more joy in heaven over one sinner who repents than over ninety-nine righteous persons who need no repentance.
NRSV: New Revised Standard Version