“All scripture is given by inspiration of
God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness.”
2 Timothy 3:16

A plumb line is a cord with a lead weight, or plumb, on one end. It is used to determine vertical direction. Because of the earth’s gravity, the plumb will hold the cord straight and perpendicular to the earth. The plumb, sometimes called the plumb bob, is egg- or pear-shaped and comes to a point. When held along the brick wall, a plumb line will show whether the wall is crooked or straight.

Plumb lines have been in use at least as far back as the early work of masons in Egypt. King Menes of Egypt is known to have used them in about 2900 B.C. They are mentioned in the
Bible in several Old
Testament
Scriptures.

Even today, masons constantly use a plumb line to determine if they are building a wall straight and true. This device is also used to determine if an old wall is still straight.

When King Solomon died, the nation of Israel was divided into two parts-the northern kingdom (Israel) and the southern kingdom
(Judah). Our last story told how Judah was captured by the Babylonians because of idol worship. But even before that, the northern kingdom of Israel had turned from God to idols.
So God sent a preacher to tell them that he as measuring them with a plumb line. Why did he say that? They were not a brick wall. God meant that he was checking them out to see if they were staying true to him.

Talking back to parents
Stealing or cheating
Complaining about going to church
Not praying when tempted to sin
Disobeying parents
Cursing
Not reading and studying the Bible
Loving to do worldly things
Lying
Psalm 122:1
2 Timothy 2:15
Ephesians 6:1
Exodus 20:15
1 John 2:15
Ephesians 6:2
Ephesians 4:25
Exodus 20:7
Matthew 26:41