Bible Verses About Shepherds: Searching them out when lost and straying

As the shepherd visiteth his flock in the day when he shall be in the midst of his sheep that were scattered, so will I visit my sheep, and will deliver them out of all the places where they have been scattered in the cloudy and dark day.

What man of you that hath an hundred sheep, and if he shall lose one of them, doth he not leave the ninety-nine in the desert and go after that which was lost, until he find it?

And when he hath found it, lay it upon his shoulders, rejoicing?