'Therein' in the Bible

and heal the sick that are therein, and say unto them, The kingdom of God is come nigh unto you.

Verily I say unto you, Whosoever shall not receive the kingdom of God as a little child, he shall in no wise enter therein.

Then let them that are in Judaea flee unto the mountains; and let them that are in the midst of her depart out; and let not them that are in the country enter therein.