says "And on the table you shall set the bread of display, to be before [God] continually." Rabbi Jose taught that even if they took the old bread of display away in the morning and placed the new bread on the table only in the evening, they had honored the commandment to set the bread "continually." Rabbi Ammi analogized from this teaching of Rabbi Jose that people who learn only one chapter of Torah in the morning and one chapter in the evening have nonetheless fulfilled the precept of that "this book of the law shall not depart out of your mouth, but you shall meditate therein day and night." And thus Rabbi Johanan said in the name of Rabbi Simeon ben Yohai that even people who read just the Shema morning and evening thereby fulfill the precept of . Rabbi Johanan taught that it is forbidden, however, to teach this to people who through ignorance are careless in the observance of the laws (as it might deter them from further Torah study). But Rava taught that it is meritorious to say it in their presence (as they might think that if merely reciting the Shema twice daily earns reward, how great would the reward be for devoting more time to Torah study). A Midrash warned that if one changed the Hebrew letter dalet () in the word , echad ("one") in into the letter resh () (changing the word from "one" to "strange") one could cause the destruction of the Universe. A Midrash interpreted , "My beloved is like a gazelle or a young hart; behold, he stands behind our wall," to apply to God's Presence in the synagogue. The Midrash read the words, "behold, He stands behind our wall," to allude to the occasion in when God came to visit Abraham on the third day after Abraham's circumcision. says, "And the Lord appeared to him by the terebinths of Mamre, as he sat (, yoshev) . . . ." The word for "he sat" is in a form that can be read yashav, the letter vav () being omitted, as though it read that Abraham was sitting before he saw God, but on seeing God, he wanted to stand up. But God told him to sit, as Abraham would serve as a symbol for his children, for when his children would come into their synagogues and houses of