And now we shall begin to bring the explanations of the commentators on the repetition of the words 'Leil Shimurim' (Night of Watching). First, we have the explanation of Rashi, of blessed memory, who wrote as follows: "Leil Shimurim — The Holy One, blessed be He, was watching and anticipating this night to fulfill His promise to bring them out of the land of Egypt. This is the night for Hashem — this is the night He told Abraham, 'On this night I will redeem your children.' Shimurim for all the children of Israel throughout their generations — protected from harm, as it is said (Exodus 12:23), 'and He will not permit the destroyer, etc.'" It is clear from his words that the meaning of the first occurrence of the word 'Shimurim' and the second are not the same. The first is used in the sense of anticipation and waiting, as we explained in the second of the four meanings we presented in our introduction, while the second 'Shimurim' mentioned here is used in its simple meaning of protection from harm. The reason that compelled Rashi to change the interpretation of the second 'Shimurim' from the first, the Siftei Chachamim (Lips of the Wise) wrote: "For Rashi found it difficult, as it is written, 'Shimurim for all the children of Israel throughout their generations' — would this night of the Exodus be forever? And he answers, protected from harm, meaning, every night like this that comes every year is protected from harm."