In exploring the topic of a convert or orphan who is married as a Na'arah, I stumbled upon a surprising piece in the Beis Shmuel:
...הואיל קידושין דאורייתא הם ונישואין אינם מדאורייתא...
...since Kiddushin is from the Torah, but Nisuin is not from the Torah...
While it's obvious that Kiddushin is from the Torah, I was surprised to see an opinion that Nisuin is not from the Torah, as I had never heard of such a thing before. Indeed, it's the Rambam's opinion that Kiddushin and Nisuin are two parts of the same Biblical mitzvah (as discussed here).
- What is the Beis Shmuel's source for this assertion?
- Whatever the answer to #1, how does the Rambam address it?