In the evening, &c.— It was the custom to introduce the bride veiled to the bridegroom in the nuptial chamber, in which there was very little or no light. This made it easy for Laban to deceive Jacob; but as Leah herself must have been an accomplice in the fraud, one cannot wonder at Jacob's great preference of Rachel to her. Piqued and grieved as Jacob was, no doubt, at such treatment, his conscience must have represented it to him as a kind of retaliation to him for his guile in personating his brother.
Related Commentaries of Genesis 29:23
Genesis 29:23
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.