Genesis 38:6 in the World English Bible
Judah took a wife for Er, his firstborn, and her name was Tamar.
Context
5 And she yet again conceived, and bare a son; and called his name Shelah: and he was at Chezib, when she bare him.
6 And Judah took a wife for Er his firstborn, whose name was Tamar.
7 And Er, Judah’s firstborn, was wicked in the sight of the LORD; and the LORD slew him.