רִבִּי אֶלְעָזָר אָמַר, יַעֲקֹב אָמַר שִׁירָתָא דָא (דהא), בְּשַׁעְתָּא דְּאָמַר לֵיהּ אֲבוֹי, (בראשית כ״ז:כ״א) גְּשָׁה נָא וַאֲמֻשְׁךָ בְּנִי הַאַתָּה זֶה בְּנִי עֵשָׂו אִם לֹא, כְּדֵין (ד"א בגין) דְּהֲוָה (הוה) יַעֲקֹב בְּעָאקוּ סַגִּי, דְּדָחִיל דְּאֲבוֹי יְדַע לֵיהּ וְאִשְׁתְּמוֹדַע קַמֵּיהּ. מַה כְּתִיב, (בראשית כ״ז:כ״ג) וְלא הִכִּירוֹ כִּי הָיוּ יָדָיו כִּידֵי עֵשָׂו אָחִיו שְׂעִירוֹת וַיְבָרֲכֵהוּ. כְּדֵין אָמַר, (תהילים ק״כ:א׳) אֶל יְיָ בַּצָּרָתָה לִי קָרָאתִי וַיַּעֲנֵנִי. R. Eleazar said: ‘It was Jacob who uttered this psalm at the moment when his father said to him: “Come near, I pray thee, that I may feel thee, my son, whether thou be my very son Esau or not.” That was a moment of great distress for Jacob, as he feared that his father would recognize him. We read, however: “And he discerned him not, because his hands were hairy, as his brother Esau’s hands; so he blessed him.” It was then that Jacob said: “In my distress I called unto the Lord, and he answered me.’

(שם) יְיָ הַצִּילָה נַפְשִׁי מִשְּׂפַת שֶׁקֶר מִלָּשׁוֹן רְמִיָה, דָּא הוּא דַּרְגָּא דְעֵשָׂו שַׁרְיָא בֵּיהּ, דְּאִיהוּ שְׂפַת שֶׁקֶר (ס"א מה הוא). שְׂפַת שֶׁקֶר, בְּשַׁעְתָּא דְאַיְיתֵי הַהוּא חִוְיָא לְוָוטִין עַל עַלְמָא, וּבְחַכִּימוּ וּבַעֲקִימוּ אַיְיתֵי לְוָוטִין, דְּאִתְלַטְיָא עָלְמָא. “O Lord, deliver my soul from lying lips, from a deceitful tongue” (Ps. 120, 1-2). The “lying lips” is a reference to the grade of Esau, which is so called because when the serpent brought curses into the world it was by means of cunning and crookedness.