Luke 15:1-10.
Pharisees and other lawyers were murmured saying "Jesus welcomes sinners and even eats with them." Jesus told them a parable about one lost sheep. "You have a hundred sheep and you lost one of them. Don't you leave the 99 sheep to look for the lost one? When you find it, you would be very pleased laying the sheep on your shoulder. Listen, there is a great joy in heaven when one sinner turns away from sin, more than 99 people who need no repentance."
