"and chametz shall not be seen unto you, and se'or shall not be seen unto you": chametz is likened to se'or, and se'or to chametz. Just as the one may not be seen, so, the other. Just as the one may not be found, so, the other. Just as the one is of the five species (of grain), so, the other. "in all of your boundaries": What is the intent of this? From (12:19) "seven days leaven shall not be found in your houses," I might think, "houses," literally; it is, therefore, written "in all of your boundaries." If the latter alone were written, I would think, "boundaries," literally. It is, therefore, written "in your houses." Just as "your houses" implies your possession, so, "your boundaries"