יב היכי דמי מתנמנם אמר רב אשי
12 The one who reads, yesar, justifies his view the way we have just stated, but the one who reads, yeaser, what does this mean? - It has been taught in the Scroll of Fasts: Any man who is subject to a fast previous to this [incidence of these festive days] is forbidde [to break his fast]. How is this to be understood? If a man undertook to fast on Mondays and Thursdays throughout the year and any of the festive days enumerated in the Scroll of Fasts happens to fall on those days, then if his vow was made previous to our decree his vow overrides our decree, but if our decree was made before his vow then our decree overrides his vow. Our Rabbis taught: Until when may one eat and drink [on the night preceding a fast]? Until the rise of dawn; this is the opinion of Rabbi. R'Eliezer B'Simeon says: Until cock crow. Abaye said: This only holds good where a man had not yet finished his meal, but if he had finished his meal he may not eat again. Raba raised an objection against this: If one had completed his meal and rose from the table, he may eat further! - There it speaks of the case where he had not yet removed the [table].<span class="x" onmousemove="('comment',' The meal is not looked upon as ended.');"><sup>12</sup></span> Some say, Raba said: This holds good only when he has not gone to sleep, but if he has gone to sleep he may not eat again. Abaye raised an objection against this: If one had gone to sleep and then got up he may eat again! - There it speaks of the case where he was merely dozing. What constitutes dozing? -R'Ashi replied: