The Parable of the Lost Sheep

The tax collectors and sinners were all drawing near to listen to him, but the Pharisees and scribes began to complain, saying, “This man welcomes sinners and eats with them.” So to them he addressed this parable. “What man among you having a hundred sheep and losing one of them would not leave the ninety-nine in the desert and go after the lost one until he finds it? And when he does find it, he sets it on his shoulders with great joy and, upon his arrival home, he calls together his friends and neighbors and says to them, “Rejoice with me because I have found my lost sheep.” I tell you, in just the same way there will be more joy in heaven over one sinner who repents than over ninety-nine righteous people who have no need of repentance.
–Luke 15:1-7