Sometimes, the answer lies hidden in plain sight, tucked away in ancient commentaries on the Torah. Take, for example, the seemingly simple act of bathing a baby after circumcision. It turns out, this practice has a fascinating and surprisingly complex history, rooted in a particular verse in Genesis.

The verse in question speaks of the sons of Jacob, Simeon and Levi, and their vengeful attack on the city of Shechem after their sister Dina was violated. Genesis 34:25 reads: "It was on the third day, when they were in pain, that the two sons of Jacob, Simeon and Levi, Dina's brothers, each man took his sword, and came upon the city confidently, and killed all the males.”

Now, what does this violent verse have to do with bathing a baby? Well, the Rabbis of the Midrash, specifically in Bereshit Rabbah 80, saw a connection. They focused on the phrase, "It was on the third day, when they were in pain." This "third day," they reasoned, was significant.

The Midrash then launches into a discussion about whether it is permissible to bathe a child with hot water on Shabbat, especially if that Shabbat coincides with the third day after circumcision. You see, the third day after circumcision is often considered the most painful for the infant.

The text references a debate between the school of Rabbi Meir, who apparently taught that one bathes "the circumcision," and Rabbi Yosei, who insisted that the correct teaching is that one bathes "the child." Rabbi Ze’eira even recounts how Rabbi Yosei would constantly correct him, saying, "Say over your mishna [your teaching], [one bathes the child], as we learned..." This highlights the importance of the correct phrasing and the subtle difference in meaning.

Why the fuss over this tiny change in wording? Well, the Midrash explains that if one only bathes the circumcision, what's the difference between a child's wound and an adult's wound? The point, they argue, is to teach us that we bathe the entire body of the child, something that wouldn't be permitted for an adult (except for the specific wound).

The discussion continues with Rabbi Elazar ben Azarya, who specifies that one bathes the child on the third day from circumcision that coincides with Shabbat. Rabbi Yaakov bar Aḥa adds that Rabbi Yoḥanan and Rabbi Yonatan would instruct midwives to perform all necessary treatments on Shabbat if the third day after circumcision fell on that day.

Then, Shmuel chimes in, suggesting that the reason for these leniencies is due to danger. In other words, the health and well-being of the child overrides the usual restrictions of Shabbat. Rabbi Yosei counters by saying that if danger is the concern, then surely we can prepare hot water on Shabbat itself! He references a teaching that allows one to heat a cloth and place it on a wound on Shabbat for healing purposes.

Finally, Rabbi Yehoshua ben Levi concludes that there is no prohibition at all; it is entirely permissible to bathe the child on the third day, even on Shabbat.

So, what can we take away from this ancient discussion? It shows us how Jewish law and custom aren't static. They're born from wrestling with scripture, debating interpretations, and always, always prioritizing human well-being. This passage in Bereshit Rabbah, sparked by a verse about violence and revenge, ultimately leads us to a beautiful and compassionate practice: caring for a newborn child in its time of need. It makes you wonder, doesn’t it, how many other everyday Jewish customs have such surprising and thought-provoking origins?