Мидраш к Берешит 18:1

And the Lord appeared unto him by the terebinths of Mamre (Gen. 18:1) May it please our master to teach us: How many benedictions must a man pray each day? Thus do our masters teach us: A man must pray the eighteen benedictions (of the Amidah) each day. Why eighteen? R. Samuel the son of Nahman stated: This number corresponds to the eighteen instances in which the names of the patriarchs are mentioned simultaneously in the Torah.¹Cf. Y. Berakhot 84c, Y. Taanit 82b. The first being: And God will surely remember you, and bring you out of this land to the land which he swore to Abraham, to Isaac, and to Jacob (Gen. 50:24), and the last: The Lord said to me: This is the land which I swore unto Abraham, unto Isaac, and unto Jacob (Deut. 34:4). However, if someone should insist that the patriarchs are actually mentioned nineteen times, since it is written: God of Abraham thy father, and the God of Isaac; the land whereon thou liest, to thee will I give it (Gen. 28:13), inform him that this verse is not counted, since Jacob’s name is not included (in the verse).

(Gen. 18:1:) THEN THE LORD APPEARED UNTO HIM…. Let our master instruct us: How many blessings does one pray every day?¹Tanh., Gen. 4:1. Thus have our masters taught (in Ber. 4:3): ONE MUST PRAY THE EIGHTEEN BENEDICTIONS.²The Mishnah cited attributes the teaching to R. Gamaliel. And why eighteen?³TBer. 3:25; yBer. 2:4 (5a); 4:3 (7d-8a); yTa‘an. 2:2 (65c); Ber. 9b; 28a; Gen. R. 69:4; Lev. R. 1:8; M. Pss. 20:2. < They > correspond to the eighteen references to the Divine Name which are written in (Ps. 29) ASCRIBE TO THE LORD, O HEAVENLY BEINGS. They reply to R. Levi:⁴The correspondence between the Eighteen Benedictions and Ps. 29 is attributed to R. Levi in yTa‘an. 2:2 (65c). But does not one say nineteen in Babylon? He said to them: That also is from references to the Divine Name, as stated (in Ps. 29:3): THE GOD (El) OF GLORY THUNDERS.⁵This mention of El, when added to the psalm’s eighteen repetitions of the Tetragrammaton, results in nineteen references to the Holy One. R. Simon said: < The Eighteen > correspond to the eighteen vertebrae which are in the spine, since when one stands to pray, it is necessary to bend over with all of them. Thus it is stated (in Ps. 35:10): ALL MY BONES SHALL SAY: LORD, WHO IS LIKE YOU? The Holy One said: Be strictly observant in prayer, for you have no finer way than that. And even though a person is not worth answering, I shall show him loving-kindness, since all my ways are loving-kindness. R. Simlay said: Do you want to know that all the Holy One's ways are loving-kindness?⁶See below, 4:4; 5:2; Gen. R. 8:13; M. Pss. 25:11; Eccl. R. 7:2:2; also Sot. 14a. At the beginning of Torah he has adorned the bride, as stated (in Gen. 2:22): THEN THE LORD GOD BUILT THE RIB < WHICH HE HAD TAKEN FROM THE HUMAN INTO A WOMAN >.⁷According Gen. R. 18:1, the point here is that “to build” can mean “to plait” hair. Thus the verse implies that God adorned Eve as a bride by plating her hair. See also below, section 4, and the note there. Also at the end of < the Torah > there is loving-kindness in that he buried the dead, as stated (in Deut. 34:6): THEN HE (THE HOLY ONE) BURIED HIM (MOSES) IN THE VALLEY. Moreover, in the middle < of the Torah > he visited the sick, as stated (in Gen. 18:1): THEN THE LORD APPEARED UNTO HIM. As soon as Abraham had circumcised < himself > (in Gen. 17:24), the Holy One and his entourage⁸Lat.: familia. came to visit him. {It is so stated} [Where is it shown? Where they read on the matter] (in Gen. 18:1): THEN THE LORD APPEARED UNTO HIM.

R. Simlai declared: You know that all His ways are merciful from the fact that at the very beginning of the Torah He adorned (kishet) the bride, as it is said: And the Lord God formed (vayiben) the rib, etc. (Gen. 2:22). In towns situated on the seacoast, a bride is called buneh (“well-adorned”). And at the conclusion of the Torah, He buried the dead, as is written: And He buried him in the valley (Deut. 34:6). In the middle of the Torah, He visited the sick, for after Abraham was circumcised, He and His angels visited him, as we read in the chapter: And the Lord appeared unto him (Gen. 18:1).