Commentary for Genesis 33:15

ויאמר למה זה means AND HE SAID, WHY IS IT— that thou shouldst do me a favour which I do not need?”

WHY THIS? LET ME FIND FAVOUR IN THE EYES OF MY LORD. Why this, that you should do me a favor which I do not need? Let me find favour in your eyes, and do not give me any recompense at present [for the gift which I have presented to you]. This is the language of Rashi. Now Jacob’s meaning was that he did not want them and their company at all, the more so since he intended to go another way.
Our Rabbis have further seen an advisory aspect in this entire chapter. Thus they have said:⁹⁵Bereshith Rabbah 78:18. “Before embarking on a journey to the Roman ruler, Rabbi Yanai would peruse this section of the Torah, and he never took Romans with him as an escort on the return journey. One time he did not peruse this section and he took Romans with him, and he had not yet reached Acco when he was compelled to sell his travelling cloak for bribery money.” [The significance attached to this chapter] was because of the Rabbinical tradition that this was the section of the exile. Therefore when Rabbi Yanai entered Rome, in the court of the kings of Edom, [on a mission] concerning public matters, he would peruse this section of the Torah in order to follow the advice of the wise patriarch, for it is he that the generations are to see and emulate. Thus he would not accept the company of the Romans as an escort for they draw no man near to them except for their own interest⁹⁸Aboth 2:3. and take liberties with people’s belongings.

למה זה, אמצא חן בעיניך, "Why do this? Let me find favour in my master's eyes." Jacob preferred an ongoing good relationship with Esau rather than to become the beneficiary of a one-time exaggerated display of Esau's loving concern for him and his family. Jacob hinted at the future when he said אמצא חן, "let me find favour in the future."