Комментарий к Берешит 27:41

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.

AND ESAU SAID IN HIS HEART. Rabbi Abraham ibn Ezra said, “It is possible that he revealed his secret to one of his friends.”²⁴⁷If not, how did Rebekah become aware of the fact that Esau was planning to kill Jacob? (Verse 42 here).
But this is not necessarily so for any decision which a person reaches after deliberation is referred to in Hebrew as “speaking with the heart,” even when it also includes speech with the lips. A similar case is found in the verse, And with a double heart do they speak,²⁴⁸Psalms 12:3. for the will is synonymous with the heart. And all Israel were of one heart to make David king,²⁴⁹I Chronicles 12:39. meaning that they had all arrived at the same decision and were talking of it. Similarly, And Jeroboam said in his heart.²⁵⁰I Kings 12:26. Further on it says, And the king took counsel, (Verse 28). Here also there was speech which Scripture had referred to as being said in his heart. Similarly did Eliezer say, And before I had finished speaking in my heart,²⁵¹Above, 24:25. whereas the prayer there was with his lips, as Scripture states, And he said, O Eternal G-d of my lord Abraham.²⁵²Ibid., Verse 12. However it is possible that the expression, before I had finished speaking in my heart, means “before I had concluded the thought in my mind.”
Now here the verse states that when the great hatred of Jacob permeated Esau’s soul because of the blessing, he conceived the idea of murdering his brother, and with this he comforted himself from his depressed state. This explains the verse, And the words of Esau were told to Rebekah.²⁵³Verse 42 here. As Ramban explained, a decision in one’s heart, even though coupled with speech, is still referred to in Hebrew as “the speech of heart.” Therefore, the verse means that Esau decided upon a course of action, and he himself informed his mother of his decision. This is why she said to Jacob, Thy brother Esau comforts himself to slay thee.²⁵⁴Verse 42 here.
Now Rashi comments, “She was told, through Ruach Hakodesh,²³¹See above, Note 90. what Esau was thinking in his heart.” And so it is found in Bereshith Rabbah.²⁵⁵Bereshith Rabbah 67:9. If so, Esau’s words and thoughts were only in his heart, just as in the verse, I spoke with my own heart.²⁵⁶Ecclesiastes 1:16.
The reason that Esau said, Let the days of mourning for my father be at hand then will I slay my brother is because he would not bring grief to his father during his lifetime. Perhaps it was due to his fear lest his father curse him, and his blessing would then turn into a curse. Rebekah, [who nevertheless advised Jacob to flee], feared that perhaps the elderly one would die suddenly, and Esau would then kill Jacob, or perhaps he might find occasion to kill him even during Isaac’s lifetime.

יקרבו ימי אבל אבי, "the days of mourning for my father are not far off." Esau referred to the time after his father's funeral when the days of mourning commence. He was afraid to murder Jacob before his father would be buried since the dead are reputed to be aware of what goes on as long as the grave or coffin has not been sealed (Shabbat 152).