"Ten miracles were performed for our ancestors in the Beit Hamikdash...and no one ever said to his fellow, 'the place is too cramped for me to sleep in Jerusalem'" (Avot 5:7).
reunification of Jerusalem
Numbers play a significant, if usually symbolic, role in Jewish thought. Perhaps the most symbolic number is seven, representing completeness; the most obvious example is Shabbat, the highlight that completes the week. Even our new year, Rosh Hashanah, takes place in the seventh month, and the holidays of Pesach and Sukkot are meant to be seven days long. Shavuot, the culmination of the exodus, is celebrated after seven weeks of seven days.