Luke 15:7-10

7I say unto you, that even so there shall be joy in heaven over one sinner that repenteth, more than over ninety and nine righteous persons, who need no repentance.

8Or what woman having ten pieces of silver, if she lose one piece, doth not light a lamp, and sweep the house, and seek diligently until she find it? 9And when she hath found it, she calleth together her friends and neighbors, saying, Rejoice with me, for I have found the piece which I had lost. 10Even so, I say unto you, there is joy in the presence of the angels of God over one sinner that repenteth.