Bava Kamma 60B

לעולם יכנס אדם ב״כי טוב״ ויצא ב״כי טוב״, שנאמר: ״ואתם לא תצאו איש מפתח ביתו עד בקר״.

A person should always enter an unfamiliar city at a time of good, i.e., while it is light, as the Torah uses the expression “It is good” with regard to the creation of light (see Genesis 1:4). This goodness is manifest in the sense of security one feels when it is light. And likewise, when one leaves a city he should leave at a time of good, meaning after sunrise the next morning, as it is stated in the verse: “And none of you should go out of the opening of his house until the morning” (Exodus 12:22).

תנו רבנן: דבר בעיר ⁠– כנס רגליך, שנאמר: ״ואתם לא תצאו איש מפתח ביתו עד בקר״. ואומר: ״לך עמי בא בחדריך, וסגור דלתך בעדך״. ואומר: ״מחוץ תשכל חרב, ומחדרים אימה״.

§ A baraita states: If there is plague in the city, gather your feet, i.e., limit the time you spend out of the house, as it is stated in the verse: “And none of you should go out of the opening of his house until the morning.” And it says in another verse: “Come, my people, enter into your chambers, and shut your doors behind you; hide yourself for a little moment, until the anger has passed by” (Isaiah 26:20). And it says: “Outside the sword will bereave, and in the chambers terror” (Deuteronomy 32:25).

מאי ״ואומר״? וכי תימא: הני מילי בליליא, אבל ביממא לא; תא שמע: ״לך עמי בא בחדריך, וסגור דלתך״.

The Talmud asks: What is the reason for citing the additional verses introduced with the term: And it says? The first verse seems sufficient to teach the principle that one should not emerge from one’s house when there is a plague. The Talmud answers: And if you would say that this matter, the first verse that states that none of you should go out until morning, applies only at night, but in the day one may think that the principle does not apply, for this reason the Talmud teaches: Come and hear: “Come, my people, enter into your chambers, and shut your doors behind you.”