Charles Ellicott Commentary Genesis 29:23

"And it came to pass in the evening, that he took Leah his daughter, and brought her to him. And he went in unto her." — Genesis 29:23 (ASV)

He took Leah his daughter. —As the bride is taken to the bridegroom’s house closely veiled (see Note on Genesis 24:65), and as probably there was some similarity in voice and form between the two sisters, this deception was quite easy. But Leah must have been a party to the fraud, and therefore Jacob’s dislike of her was not altogether without reason.