Jesus gave the parable of the lost piece of silver.
“A woman had ten pieces of silver and lost one. She lit a candle and cleaned her whole house, looking diligently until she finds it.
“Then she invites all her friends and neighbors to celebrate, saying, ‘Be happy with me! I have found the piece that was lost!’
“It is with the same joy that the angels of God feel over one sinner who repents.”