מדרש על בראשית 12:1

And the Lord said unto Abram: “Get thee out of thy country” (Gen. 12:1). May it please our master to teach us whether an Israelite is permitted to take upon himself the yoke of the heavenly kingdom (i.e., to recite the Shema) while traveling? R. Idi and R. Huna said in the name of R. Judah, and R. Yosé said in the name of R. Samuel: An Israelite is forbidden to take upon himself the yoke of the heavenly kingdom while traveling. He is required to stand still, directing his heart heavenward in trepidation and fear, in trembling and reverence, while proclaiming the oneness of God: Hear, O Israel, the Lord our God, the Lord is One (Deut. 6:4). He must speak each word with heartfelt sincerity, and then (add the benediction) “Blessed be His name, whose glorious kingdom is forever and ever.”¹Cf. Y. Berakhot 13b, Buber Tanhuma, Lekh Lekha 1. However, when he commences the portion “And thou shalt love the Lord thy God,” he may either walk or stand or sit, as he desires, for it is written: When thou sittest in thy house, when thou goest on thy way, when thou liest down, and when thou risest up (Deut. 6:7).

(Gen. 12:1:) NOW THE LORD SAID UNTO ABRAM: GO…. {Let our masters teach} [Let our master instruct us]: What does it mean for one to take upon himself the Kingdom of Heaven (i.e., recite the Shema' while he is walking?¹yBer. 2:1 (4a); cf. Ber. 13b; Tanh., Gen. 3:1. Rav Idi and Rav Huna in the name of R. Jose bar Judah said in the name of R. Samuel:²Since R. Jose bar Judah flourished somewhat earlier than R. Samuel, the text here presents a chronological problem. Variant readings to this text represent attempts at a solution. It is forbidden for a person to take upon oneself the yoke of the Kingdom of Heaven while he is walking. Rather let him stand < still > upon his feet and give the recitation of the Shema'. Then, when he arrives at "Blessed be the name of his glorious majesty forever and ever," let him immediately begin to walk < while > reciting the We'ahavta (= Deut. 6:5) with no fear (of sinning). You find that whoever is meticulous about the commandments receives much reward. Now Abraham was meticulous about the commandments.³On Abraham keeping the Mosaic Law, see Syriac Baruch 57:1-2; cf. Jubilees 23:10; Damascus Document (CD) 3:2; Qid. 4:14; Yoma 28b; Ned. 32a (bar.); Gen. R. 49:2; 95:3; also below, 3:14. R. Aha said in the name of R. Alexandri and R. Samuel bar Nahmani in the name of R. Jonathan: They even kept eruvim of cooked foods in Abraham's house,⁴Yoma 28b; Gen. R. 49:2; 64:4; M. Pss. 1:13. as stated (in Gen. 26:5): BECAUSE ABRAHAM HEEDED MY VOICE [AND KEPT MY CHARGE: MY COMMANDMENTS, MY STATUTES, AND MY TORAHS]. But is there not a single Torah? < The plural usage here > simply < indicates > that he was meticulous with all commandments which are in < oral and written > Torah.⁵See below, 3:14; 11:12. The Holy One said: You are meticulous with my commandments; so should you dwell with those who serve idols? Go out from among them. {Thus it is stated} [Where is it shown? Where they read on the matter] (in Gen. 12:1): NOW THE LORD SAID UNTO ABRAM: GO.

(10) R. Isaac said: "A year which is poor (Israel appears humble) in the beginning, will be rich in the end (Israel's request will be granted). What is the reason for it? For it is written (Deut. 11, 12) From the beginning of the year even unto the end of the year; i.e., there are two parts in a year, the beginning and the end." (Ib. b) K. Isaac said again: "A man is judged only according to his deeds at the time of sentence; as it is said (Gen. 21, 17) God heard the voice of the lad, as he then was." Another thing R. Isaac said: "Three things cause a man's record of sins to be recalled. Three occasions cause the sins of man to be brought to mind: a threatening wall, calculating during prayer, and one who appeals to the Lord for judgment on his neighbor; for R. Chanin said: 'Whoever appeals to the Lord for judgment on his neighbor is first punished; as we find in the case of Sarah, who said (Gen. 16, 5) I suffer wrong through thee, may the Lord judge between me and thee. And shortly after this we read (Ib. 23, 2) And Abraham came to mourn Sarah and to weep for her.'" Another thing said R. Isaac: "Four things cause an evil decree which is passed on man to be torn (annulled). They are charity, prayer, change of name and change of conduct: Charity, as it is written (Prov. 10, 2) Charity delivereth from death; prayer, as it is WTitten (Ps. 97, 19) They cry unto the Lord when they are in distress, and He saveth them out of their afflictions; change of name, as it is written (Gen. 17, 15) As for Sarai, thy wife, thou shalt not call her name Sarai, but Sarah shall her name be: and the text continues saying: Then will I bless her, and give thee a son also, because of her change of conduct; as it is written (Jonah 3, 10) And God saw their works that they had turned from their evil ways; and immediately following: And God bethought Himself of the evil He had said He would do unto them, and He did it not." Some add also the change of location; as it is said (Gen. 12, 1-2) And God said to Abraham, get thee out from thy land [and afterwards] I will make of thee a great nation. But the former authority claims that the latter one was on account of the merits of the land of Israel.