1 Chronicles 2:3

3 Judah had Er, Onan, and Shelah; their mother was Bathshua the Canaanite. Er, Judah's firstborn, was so bad before God that God killed him.

1 Chronicles 2:3 Meaning and Commentary

1 Chronicles 2:3

The sons of Judah
The genealogy begins with him, though the fourth son of Jacob; because, as Kimchi says, this book treats chiefly of the kings of Judah; but rather not only because Jesse and David sprang from him, but also the King Messiah:

Er, and Onan, and Shelah, which three were born unto him of the
daughter of Shua the Canaanitess;
see ( Genesis 38:2 Genesis 38:12 ) ,

and Er, the firstborn of Judah, was evil in the sight of the Lord;
because he did that which was evil:

and he slew him;
he died by the immediate hand of God, and so his brother Onan, being wicked also, ( Genesis 38:7 Genesis 38:10 ) .

1 Chronicles 2:3 In-Context

1 Israel's (that is, Jacob's) sons: Reuben, Simeon, Levi, Judah, Issachar, Zebulun,

2 Dan, Joseph, Benjamin, Naphtali, Gad, and Asher.

3 Judah had Er, Onan, and Shelah; their mother was Bathshua the Canaanite. Er, Judah's firstborn, was so bad before God that God killed him.

4 Judah also had Perez and Zerah by his daughter-in-law Tamar - a total of five sons.

5 Perez had Hezron and Hamul;