'Therein' in the Bible

This book of the law shall not depart out of your mouth, but you shall meditate on it day and night, that you may observe to do according to all that is written therein: for then you shall make your way prosperous, and then you shall have good success.

The border of the children of Dan went out beyond them; for the children of Dan went up and fought against Leshem, and took it, and struck it with the edge of the sword, and possessed it, and lived therein, and called Leshem, Dan, after the name of Dan their father.