Matthew 18:13

And if it maybe that he finds it, truly I say unto you, that he rejoiceth more over it than over the ninety and nine that went not astray.

Luke 15:5-10

And having found it, places it on his shoulders, rejoicing:

Luke 15:23-24

and bring hither the fatted calf, slay him, and eating, let us be merry:

John 4:34-36

Jesus says to them, My food is that I may do the will of Him that sent me, and finish His work.

James 2:13

For judgment is without mercy to him that shows no mercy; but mercy glorieth against judgment.

Treasury of Scripture Knowledge

Summary

And if so be that he find it, verily I say unto you, he rejoiceth more of that sheep, than of the ninety and nine which went not astray.

Bible References

He rejoiceth

Luke 15:5
And having found it, places it on his shoulders, rejoicing:
John 4:34
Jesus says to them, My food is that I may do the will of Him that sent me, and finish His work.
James 2:13
For judgment is without mercy to him that shows no mercy; but mercy glorieth against judgment.