Genesis 29:25

25.And he said to Laban. Jacob rightly expostulates respecting the fraud practiced upon him. And the answer of Laban, though it is not without a pretext, yet forms no excuse for the fraud. It was not the custom to give the younger daughters in marriage before the elder: and injustice would have been done to the firstborn by disturbing this accustomed order. But he ought not, on that account, craftily to have betrothed Rachel to Jacob, and then to have substituted Leah in her place. He should rather have cautioned Jacob himself, in time, to turn his thoughts to Leah, or else to refrain from marriage with either of them. But we may learn from this, that wicked and deceitful men, when once they have turned aside from truth, make no end of transgressing: meanwhile, they always put forward some pretext for the purpose of freeing themselves from blame. He had before acted unjustly toward his nephew in demanding seven years’ labor for his daughter; he had also unjustly set his daughter to sale, without dowry, for the sake of gain; but the most unworthy deed of all was perfidiously to deprive his nephew of his betrothed wife, to pervert the sacred laws of marriage, and to leave nothing safe or sound. Yet we see him pretending that he has an honorable defense for his conduct, because it was not the custom of the country to prefer the younger to the elder.