This is great animation illustrating the Parable of the Lost Sheep (Luke 15:1-7).
Here’s the original passage from Scripture, courtesy of USCCB:
1 The tax collectors and sinners were all drawing near to listen to him,
2 but the Pharisees and scribes began to complain, saying, “This man welcomes sinners and eats with them.”
3 So to them he addressed this parable,
4 “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?
5 And when he does find it, he sets it on his shoulders with great joy
6 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.’
7 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.