Kabbalah su Deuteronomio 26:5

Rabbi Yehuda asks, What did Jacob have in mind when he sent Esau a message reading, "I have sojourned with Laban?" Did this message accomplish anything regarding his mission to Esau? A rumor circulated that no one had ever escaped the clutches of Laban of Aram, as he was well versed in sorcery and wizardry. He was also the father of Beor, who in turn was the father of Bilaam. As it is written, "Bilaam the son of Beor the sorcerer" (Joshua 13:22). Yet although Laban was the greatest practitioner of sorcery and wizardry, he could not overcome Jacob, whom he attempted to annihilate in several ways, as it is written, "An Aramian wanted to destroy my father" (Devarim 26:5). And so he sent him the message, "I have sojourned with Laban," to make him aware of his power.

This is the testimony that the Holy One, blessed be He, commanded to pronounce, as it is written, "And you shall speak and say before Hashem your Elohim, an Aramian wanted to destroy my father." "And you shall speak" is similar to the verses, "You shall not bear false witness" (Shemot 20:13), and also, "and has testified...against his brother" (Devarim 19:18).