Chagigah 18a
It is taught in another baraita concerning the same topic: With regard to the first day of Passover and Sukkot, the verse states: “You shall do no kind of laborious work” (Leviticus 23:35), followed by “seven days, you shall bring an offering made by fire to the Lord,” which teaches that the performance of labor is prohibited during the intermediate Festival days; this is the statement of Rabbi Yosei the Galilean. Rabbi Akiva says: This is not necessary, since it is stated earlier in that chapter: “These are the appointed Festivals of the Lord, holy convocations, which you shall proclaim in their appointed season” (Leviticus 23:4). With regard to what is the verse speaking? If it is referring to the first day of the Festival, it has already explicitly stated “a solemn rest” (Leviticus 23:39) with regard to that day; if it is referring to the seventh, it has already stated “a solemn rest” (Leviticus 23:39) with regard to that day as well. Therefore, the verse can be speaking only of the intermediate Festival days, teaching you that the performance of labor is prohibited on them. It is taught in another baraita: The verse states: “Six days you shall eat unleavened bread, and on the seventh day there shall be a solemn assembly for the Lord your God; on it, you shall do no work” (Deuteronomy 16:8). If so, just as the seventh day of the Festival is precluded from the performance of labor, so are the six intermediate Festival days precluded, since the word “and” in the phrase “and on the seventh day” connects it to the previous days. If so, perhaps: Just as the seventh day is precluded from the performance of all labor, so too the six intermediate days are precluded from the performance of all labor, even those whose performance prevents irretrievable loss. The verse therefore states: “And on the seventh day there shall be a solemn assembly,” literally, pause. This indicates that the seventh day alone is precluded from the performance of all labor, but the other six days are not precluded from the performance of all labor but only from certain forms of work. Since the Bible does not specify which types of work are prohibited, the verse has therefore entrusted the matter to the Sages exclusively, to tell you on which day work is prohibited and on which day it is permitted, and similarly which labor is prohibited and which labor is permitted.
Moed Katan 4a
What is the reason? He derives it by means of a verbal analogy between the word Shabbat stated with regard to the Sabbatical Year in the verse: “But in the seventh year shall be a sabbath of solemn rest for the land” (Leviticus 25:4), and the word Shabbat stated with regard to the weekly Shabbat, which commemorates the Shabbat of Creation. Just as there, on Shabbat itself it is prohibited to perform labor, but before and after Shabbat it is permitted, so too here, in the case of the Sabbatical Year, during the Sabbatical Year itself it is prohibited to perform labor, but before and after the Sabbatical Year it is permitted.
Bava Metzia 83b
A laborer’s entrance into the city from the field at the end of a day’s work is at his own expense, i.e., he must work until the very end of the day before returning home, and he is not paid for his travel time. In contrast, his departure to work is at his employer’s expense, i.e., he may travel after sunrise, which is time that he is paid for. The source for this is as it is stated: “The sun rises; they slink away and couch in their dens; man goes forth to his work and to his labor until the evening” (Psalms 104:22–23). This verse indicates that people set out to work only from sunrise, but they work until the very end of the day.