Genesis 38:2-4

Young's Literal Translation

² and Judah seeth there the daughter of a man, a Canaanite, whose name [is] Shuah, and taketh her, and goeth in unto her.

³ And she conceiveth, and beareth a son, and he calleth his name Er;

⁴ and she conceiveth again, and beareth a son, and calleth his name Onan;