Les Juges 19:5 Midrash : Bereshit Rabbah & Midrash Tehillim

וַֽיְהִי֙ בַּיּ֣וֹם הָרְבִיעִ֔י וַיַּשְׁכִּ֥ימוּ בַבֹּ֖קֶר וַיָּ֣קָם לָלֶ֑כֶת וַיֹּאמֶר֩ אֲבִ֨י הַֽנַּעֲרָ֜ה אֶל־חֲתָנ֗וֹ סְעָ֧ד לִבְּךָ֛ פַּת־לֶ֖חֶם וְאַחַ֥ר תֵּלֵֽכוּ׃

Le quatrième jour, ils se levèrent de bonne heure et l’on se disposa au départ; mais le père de la jeune femme dit à son gendre: "Mange un morceau pour te réconforter, vous partirez après."

Bereshit Rabbah

“And I will take a piece of bread, and you will sustain your heart, then depart, inasmuch as you have passed by your servant. They said: Do so, as you have said” (Genesis 18:5).
“And I will take a piece of bread, and you will sustain your heart, then depart” – Rabbi Yitzḥak said: In the Torah, in the Prophets, and in the Writings, we have found that bread is the sustenance of the heart. In the Torah, from where is it derived? “And I will take a piece of bread, and you will sustain your heart.” In the Prophets – “Sustain your heart with a piece of bread” (Judges 19:5). In the writings – “And bread sustains man’s heart” (Psalms 104:15).
Rav Aḥa said: “Sustain your heart [levavkhem]” is not written here, but rather, “sustain your heart [libekhem].” This teaches that the evil inclination has no authority over angels.25The word “heart” can be spelled with one bet (lev) or two (levav). When it is spelled with two bets it means to include both man’s good inclination and his evil inclination (Mishna Berachot 9:5). Here it is spelled with just one bet, indicating that angels have no evil inclination. That is in accordance to the opinion of Rabbi Ḥiyya, as Rabbi Ḥiyya said: “Direct your heart [levavkhem] to its rampart” is not written here, but rather, “libekhem” (Psalms 48:14). That is what is said: the evil inclination will have no authority in the future.26As that verse is speaking of Messianic times.
“Inasmuch as [al ken] you have passed by your servant” – Rabbi Yehoshua said: [Abraham said:] ‘From the day that the Holy One blessed be He created His world, you were foreordained to come to me,’ “inasmuch [al ken] as you have passed.”27The word ken appears numerous times in the account of creation: Vayehi khen, “and it was so.” This is as it says [in Pharaoh’s response to Moses]: “So [khen], may the Lord be with you” (Exodus 10:10).28There, too, Pharaoh meant: If it is preordained that your people should leave Egypt, so be it. He, of course, believed that it was not so.
“They said: Do [ta’aseh] so, as you have said” – they [the angels] said: ‘Eating and drinking do not apply to us, but you, for whom eating and drinking do apply, you shall do [ta’aseh] so for yourself; may it be His will that you should merit to prepare another feast for your male offspring that will be born to you.’29As recorded in Genesis 21:8.

Midrash Tehillim

Growing grass. Rabbi Yaakov bar Acha, Rabbi Nechemia, and the Rabbis [dispute this]. Rabbi Nechemia sayso : "See the language that the Sages established in the blessing of Hamotzi, for he brought bread from the ground." The Rabbis say that this refers to the future [in the days of the messiah] when he will bring forth finished loaves of bread from the ground, as it says, "Let loaves of bread be in the ground" (Psalms 72:16)[See Rashi on the Psalm there as to how the Peshat differs from the translation of the Sages]. "Bread for the eater shall be produced from the earth" (Isaiah 55:10). Rabbi Yitzchak said: "We find three places where bread is mentioned in the context of sustenance: with Abraham, as it is written, 'And I will fetch a morsel of bread, and you shall sustain your heart' (Genesis 18:5); with the Levite in Judges, as it is written, 'Sustain your heart with a morsel of bread' (Judges 19:5); and here, where it says, 'bread of the human heart shall sustain'."