When Judah saw her, he thought her to be an harlot; because she had…

And Judah took a wife for Er his firstborn, whose name was Tamar. (Genesis 38:6)

Genesis 38:6 (KJV)

And Judah took a wife for Er his firstborn, whose name was Tamar. (Genesis 38:6)

Genesis 38:6 (KJV)

And Er, Judah's firstborn, was wicked in the sight of the LORD; and the LORD slew him. (Genesis 38:7)

Genesis 38:7 (KJV)

And Judah said unto Onan, Go in unto thy brother's wife, and marry her, and raise up seed to thy brother. (Genesis 38:8)

Genesis 38:8 (KJV)

And Onan knew that the seed should not be his; and it came to pass, when he went in unto his brother's wife, that he spilled it on the ground, lest that he should give seed to his brother. And the thing which he did displeased the LORD: wherefore he slew him also. (Genesis 38:9-10)

Genesis 38:9 (KJV)

Then said Judah to Tamar his daughter in law, Remain a widow at thy father's house, till Shelah my son be grown. (Genesis 38:11)

Genesis 38:11 (KJV)