Chagigah 10A

באונס, כאן ברצון. ואיבעית אימא הא והא באונס, ולא קשיא: כאן באשת כהן, כאן באשת ישראל.

with a rape, in which case it is not prohibited for the woman to return to her husband. There, it is referring to a woman who had sex willfully, and therefore she is forbidden to her husband. And if you wish, say that this and that are both dealing with a rape, and it is still not difficult. Here, where the transgression cannot be rectified, it is referring to one who raped the wife of a priest, as it is forbidden for a priest to have sex with his wife once she has sex with any other man, even unwillingly. There, it is referring to one who raped the wife of an Israelite, in which case there is no prohibition against her returning to her husband.

״וליוצא ולבא אין שלום״, אמר רב: כיון שיוצא אדם מדבר הלכה לדבר מקרא ⁠— שוב אין לו שלום.

Since the Talmud mentioned a Torah scholar who abandons the study of Torah, it cites a relevant verse: “Neither was there any peace to him that went out or came in due to the adversary” (Zechariah 8:10). Rav said: Once a person leaves the study of halakha, i.e., Mishnah and Talmud, even for the study of the Torah itself, he will no longer have peace. The verses of the Torah are often obscure and it is difficult to learn halakha directly from them without the aid of the interpretations of the Talmud.

ושמואל אמר: זה הפורש מתלמוד למשנה. ורבי יוחנן אמר: אפילו מתלמוד לתלמוד.

And Shmuel said: This is referring to one who leaves the study of Talmud to learn Mishnah. Whereas the reasoning of the Talmud is relatively clear, the Mishnah cites legal rulings without explaining their reasoning. And R' Yoḥanan said: The verse applies even to one who leaves the study of one Talmud for the other Talmud, i.e., who leaves off his study of the Jerusalem Talmud to begin the Babylonian Talmud, as he will encounter difficulties with the new style of learning.