וַיִּשְׂטֹ֤ם עֵשָׂו֙ אֶֽת־יַעֲקֹ֔ב עַל־הַ֨בְּרָכָ֔ה אֲשֶׁ֥ר בֵּרֲכ֖וֹ אָבִ֑יו וַיֹּ֨אמֶר עֵשָׂ֜ו בְּלִבּ֗וֹ יִקְרְבוּ֙ יְמֵי֙ אֵ֣בֶל אָבִ֔י וְאַֽהַרְגָ֖ה אֶת־יַעֲקֹ֥ב אָחִֽי׃
At kinamuhian ni Esau si Jacob dahil sa basbas na ibinasbas sa kanya ng kanyang ama; at sinabi ni Esau sa kanyang puso: “Malapit na ang mga araw ng pagluluksa para sa aking ama; at papatayin ko si Jacob na aking kapatid.”
Rashi
יקרבו ימי אבל אבי THE DAYS OF MOURNING FOR MY FATHER APPROACH — Explain it according to the evident meaning of the words — (I will wait to kill him until my father is dead), that I may not cause grief to my father. There are Midrashic explanations of various kinds.
Chizkuni
וישטום עשו את יעקב על הברכה, “Esau hated Yaakov on account of the blessing;” there are some commentators who do not consider the words: על הברכה in our verse as referring to the blessing that Yaakov had “robbed” Esau of, but they consider these words as Esau’s complaint about the blessing that he did receive from his father, i.e. that he would always have to fight for his survival, על חרבך תחיה, “you will live (only) by the sword.” He placed a great deal of trust in that blessing. We would then have to understand our verse as follows: “Esau hated Yaakov, as from now on he had an assurance that by means of the sword he would always survive.”
Da'at Zekenim
יקרבו ימי אבל אבי, “the time of mourning for the passing of my father will come about soon, etc.” Esau means that if he were to bring about his father’s premature death by murdering Yaakov, he would have accomplished nothing, as his father would then die prematurely through grieving over the loss of his son Yaakov. This is why he will await his father’s death from natural causes before carrying out his plan to kill his brother.