The Gemara asks: And with regard to the murderer himself, from where do we derive this halakha that he should be killed rather than transgress the prohibition against murder? The Gemara answers: It is derived through reason, as it was told: A certain person came before Rava. He said to Rava: The master of the village where I live said to me: Kill so-and-so, and if you do not do so, I will kill you. What should I do? Rava said to him: Let yourself be killed, and you should not kill. Rava reasoned: What did you see to make you think that your blood is redder and more important than his? Perhaps the blood of that man is redder, and he is more important than you. If so, it is logical that one must not kill another person to save himself.

§ With respect to a pregnant woman who smells food, it is told: A certain pregnant woman smelled a food and craved it. Those involved came before Rabbi Yehuda HaNasi to ask how to proceed. He said to those who were inquiring: Go and whisper to her that today is Yom Kippur. They whispered to her, and this whispering helped; she stopped craving the food. Rabbi Yehuda HaNasi read this verse about the baby she was carrying: “Before I formed you in the belly I knew you, and before you came forth out of the womb I sanctified you” (Jeremiah 1:5), and indeed, the baby who came out of that woman was Rabbi Yoḥanan.

The Gemara relates another story: A certain pregnant woman smelled food and had a craving to eat it on Yom Kippur. Those involved came before Rabbi Ḥanina to ask how to proceed. He said to them: Whisper to her that today is Yom Kippur. They whispered to her, but she did not accept the whisper and continued to crave the food. Rabbi Ḥanina read this verse about the baby: