Deuteronomy also includes a somewhat stunning detail. Exodus is clear that the lamb is to be roasted over fire and not to be boiled. Deuteronomy, according to English translations, only says that the lamb is to be cooked (verse 7). So what’s stunning about that? That word cook in Deuteronomy is the same Hebrew root word for boil in Exodus. In other words, the very thing not to be done in Exodus is commanded to be done in Deuteronomy without breaking stride.
