Genesis 30:17

17. And God hearkened unto Leah. Moses expressly declares this, in order that we may know how indulgently God dealt with that family. For who would have thought, that, while Leah was hatefully denying to her sister the fruits gathered by her boy, and was purchasing, by the price of those fruits, a night with her husband, there would be any place for prayers? Moses, therefore, teaches us, that pardon was granted for these faults, to prove that the Lord would not fail to complete his work notwithstanding such great infirmity. But Leah ignorantly boasts that her son was given to her as a reward of her sin; for she had violatedthe fidelity of holy wedlock, when she introduced a fresh concubine to oppose her sister. Truly, she is so far from the confession of her fault, that she proclaims her own merit. I grant there was some excuse for her conduct; for she intimates that she was not so much excited by lust, as by modest love, because she desired to increase her family and to fulfill the duty of an honorable mother of a family. But though this pretext is specious in the eyes of men, yet the profanation of holy marriage cannot be pleasing to God. She errs, therefore, in taking what was no cause for the cause. And this is the more to be observed; because it is a fault which too much prevails in the world, for men to reckon the free gifts of God as their own reward; yea, even to boast of their deserts, when they are condemned by the word of God. In her sixth son, she more purely and rightly estimates the divine goodness, when she gives thanks to God, that, by his kindness, her husband would hereafter be more closely united to her, (verse 20). For although he had lived with her before, yet, being too much attached to Rachel, he was almost entirely alienated from Leah. It has before been said, that children born in lawful wedlock are bonds to unite the minds of their parents.