25:11כ״ה:י״א
1 א

ויהי אחרי מות אברהם ויברך וגו'. נִחֲמוֹ תַּנְחוּמֵי אֲבֵלִים. דָּ"אַ אַעַ"פִּ שֶׁמָּסַר הַקָּבָּ"ה אֶת הַבְּרָכוֹת לְאַבְרָהָם, נִתְיָרֵא לְבָרֵךְ אֶת יִצְחָק מִפְּנֵי שֶׁצָּפָה אֶת עֵשָׂו יוֹצֵא מִמֶּנוּ, אָמַר יָבֹא בַּעַל הַבְּרָכוֹת וִיבָרֵךְ אֵת אֲשֶׁר יִיטַב בְּעֵינָיו, וּבָא הַקָּבָּ"ה וּבֵרְכוֹ (סוטה י"ד):

ויהי אחרי מות אברהם ויברך וגו AND IT CAME TO PASS AFTER THE DEATH OF ABRAHAM THAT GOD BLESSED ISAAC etc. — He comforted him with the words of the formula of consolation which we offer to mourners (Sotah 14a). Another explanation is: Although the Holy One, blessed be He, had entrusted the blessings to Abraham to bless whomever he wished yet he (Abraham) feared to bless Isaac, because he foresaw that Esau would be born from him. He therefore said, “Let the Master of the blessings come himself and bless whomever it seems proper in his eyes” — God came and blessed him (Isaac)(Genesis Rabbah 61:6).