'Lost Sheep' in the Bible

I have wandered off like a lost sheep. Come looking for your servant, for I do not forget your commands.

"My people have been lost sheep. Their shepherds have allow them to go astray. They have wandered around in the mountains. They have roamed from one mountain and hill to another. They have forgotten their resting place.

Go instead to the lost sheep of the house of Israel.

So he answered, "I was sent only to the lost sheep of the house of Israel."