They went astray for following God. Jesus came to restore the lost sheep first of Israel then all nations.

Source: Isaiah 53:6

They were sent to the lost sheep of the house of Israel. They were not to go to the gentiles or Samartians.

Source: Matthew 10:1-6

Jesus sent out the disciples to recuse the “lost sheep” he also specified that they should look for a particular class of lost sheep. Which lost sheep did he specify?

Lost people are often referred to as sheep that have gone astray. Where is the first written down in the Bible?

It is first found in the book of Psalms specifically Psalm 119.

Source: Psalms 119:176

A man of Ur he was the founder of multiple religions?

This is Abraham the ancestor of Judaism and Christianity Islam also considers him a founder.

Source: Genesis 11:31-32

Of the tribe of Manasseh, he was an ordinary farmer threshing wheat when God called him. Who is he?

This is Gideon who with his three hundred freed his people. The land enjoyed forty years of peace afterword.

Source: Judges 6:1-16

Amos came from a very common job to become a prophet, What did he do before becoming a prophet?