Comentario citado sobre Génesis 30:39

It appears that according to the agreement Jacob made he did not want Laban to take the ankle-striped animals. If Laban were to take those Jacob would also have to separate them from the white sheep and he, Jacob, would not be left with white animals which could respond to the stratagem he employed later when the animals were in heat. All his efforts would then have been in vain. It had not occurred to Jacob to deceive Laban in any way whatsoever. He thought that the sight of ankle-striped ones would cause the flocks to become heated and to cause also the speckled and spotted animals to give birth. When you read verse 40 you will find confirmation of what I have said. Crafty Laban was aware of all these implications and took every type, i.e. the עקוד, נקוד וטלוא. In addition he removed every animal that had some white on its pelt. In this way Jacob's potential wages were reduced to almost nothing. This is why Jacob had to resort to the stratagem with the rods; he therefore also took some of the ankle-striped ones for himself. When Laban removed the mother animals he had thereby proved that he considered them as basically Jacob's (the new generation). Proverbs 5,22: "he will be caught in the ropes of his sin" is applicable to what Laban tried to do in this paragraph.

לשבור אל יוסף, “to buy grain from Joseph;” the unusual construction here, when we would have expected the Torah to write: לשבור מיוסף “to Joseph in order to buy food;” is similar to construction Genesis 30,39: אל המקלות where the word אל also means: “from,” “as a result of,” (seeing the sticks that had been peeled by Yaakov).