כי תבנה בית חדש ועשית מעקה לגגך
Noting the juxtaposition of the law of maakeh, fence for a roof, upon the previous law of shiluach ha’kein, Rashi comments, “If you fulfilled the mitzvah of sending away the mother bird from the nest, your end will be to (merit to) build a new house and will fulfill the mitzvah of maakeh, for mitzvah goreres mitzvah, a mitzvah engenders another mitzvah after it.” One wonders: Is it possible to live without a house? Obviously not. If so, why does Rashi emphasize that the house is the result of mitzvas shiluach ha’kein, which will now engender the mitzvah of maakeh?…