There are a number of long genealogy lists in the Bible, which go like: soandso begat soandso, etc. or the like. But from time to time, like little nuggets in a mine, little stories are included. Probably the most famous of these is "The Prayer of Jabez."

Here is one from 1 Chronicles 2:

The sons of Judah: ER and Onan and Shelah, which 3 were born to him of Bath-shua the Canaanitess. And Er, Judah's firstborn, was wicked in the sight of Yahweh, and He slew him.

A nice little story -- LOL.

Here we have a son of Jacob named Judah, the progenitor of the tribe of Judah and of the Lord Jesus. Judah's name eventually came out in the expression "Jew."

Judah starts out looking bad in the Bible -- he even has sex with his daughter-in-law, but ends up looking much better in the end -- but that is a different story. At any rate, we have Judah illustrating the stupidity and sin of a person under covenant blessing from the Lord marrying an unregenerate (unsaved) person, with negative consequences.

This chap Er gets little notice in the Bible, except that he was wicked. We don't know the details. However, the Lord notices sin and does not like it. Thus Er was put to death. And we also don't know how.

Now it is nice to have the Lord "not notice" our sins. Blessed is the man to whom the Lord does not impute iniquity. The color of sin in the Bible is red (though your sins be as scarlet, they shall be as white as wool). A person can become color blind to red and not see it.

To illustrate this, get a red magic marker and write "SIN" on your forehead. Then put on red glasses of the same shade of red or look at yourself in a mirror through red cellophane (same shade of red as the mark). The mark will be invisible.

It is the red blood of the Lord Jesus, slain on the cross, that causes the Lord to "not see" our sins. We can picture God the Father looking at us sinnners through the blood of Jesus and declaring us righteous, as He cannot then "see" our sins.

This is also illustrated in the Tabernacle. In the Tabernacle there was a Holy of Holies, and in that Holy of Holies a box called the Ark of the Covenant. Inside that ark there was the 10 commandments. The law of God reveals sin. Thus we can picture our sins made visible on the 10 commandments. The golden lid of the ark is called the "Mercy Seat." On that Mercy Seat the red blood of sacrifices was sprinkled. Above the Mercy Seat was the Shekinah Glory, which we can picture as a bright cloud indicating the presence of the Lord. Then we can picture the Lord above the Mercy Seat looking down on our sins revealed by the 10 commandments in the Ark; but between His line of sight and the Ark is the red blood, typical of the blood of the Lord Jesus, shed on the cross for our sins.

Blessed is the person whose sins are covered, as it were, from the sight of the Lord by the blood of Jesus, whose saving work has been appropriated by depending on Him as savior.