Then Jesus told them this parable:
“Suppose one of you has a hundred sheep and loses one of them. Doesn’t he leave the ninety-nine in the open country and go after the lost sheep until he finds it?
And when he finds it, he joyfully puts it on his shoulders
and goes home. Then he calls his friends and neighbors together and says, ‘Rejoice with me; I have found my lost sheep.’
I tell you that in the same way there will be more rejoicing in heaven over one sinner who repents than over ninety-nine righteous persons who do not need to repent.
“Or suppose a woman has ten silver coinsand loses one. Doesn’t she light a lamp, sweep the house and search carefully until she finds it?
And when she finds it, she calls her friends and neighbors together and says, ‘Rejoice with me; I have found my lost coin.’
In the same way, I tell you, there is rejoicing in the presence of the angels of God over one sinner who repents.”
References for Luke 15:10