창세기 31:41의 Musar

Therefore, anticipating this, he fled to Shem and Ever and studied Torah there with great diligence for fourteen years. For all of these years he did not once lay down to sleep a full sleep, as Scripture testifies about him (Ibid. 28:11): "And he slept in that place," as Rashi explains there. And, with such learning, though he remained in the house of Lavan afterwards for several years, nothing could harm him. [According to our words, the figure of fourteen years is very apt. For since they were meant to offset the years that he would have to remain in the house of Lavan, and it is known that this would be fourteen years, Jacob knowing that he could not return to his house so long as Joseph had not been born, he [Joseph] being as "flame" and Esav as "straw" [see Ovadiah 1:18], and as it is written (Bereshith 30:25): "And it was, when Rachel bore Joseph, that Jacob said to Lavan: "Send me away, etc.'", (as Rashi explains), and it is known that Joseph was in the fourteenth year, as it is written (Ibid. 31:41): "I served you fourteen years for your two daughters, etc." — therefore, Jacob first learned Torah fourteen years without interruption, so that the merit of these fourteen years would stand for him in the house of Lavan, as mentioned above.]