Matthew 10:6
"but rather be on your way to the lost sheep of the house of Israel.
Matthew 15:24
In reply he said, "I was not sent except to the lost sheep of the house of Israel."
Matthew 18:12-13
"How does it seem to you, when a man has a hundred sheep and loses one of them? Will he not leave the ninety and nine on the hills, to go and search for the one that has strayed?
Luke 10:31-32
"Now a certain priest chanced to be going down that way, but on seeing him he passed on the other side.
Luke 15:4-6
"Which one of you men, if he has a hundred sheep, and has lost one of them, does not leave the ninety and nine in the desert and go after the lost one until he finds it?
James 5:19-20
My brothers, if any one of you strays from the truth, and some one brings him back,
1 Peter 2:25
For you were straying like lost sheep, but you are now returned to the Shepherd and Guardian of your souls.