According to Maimonides, Passover (mentioned in ) is kept seven days, because a week is the intermediate unit of time between a day and a month. Passover teaches people to remember the miracles that God performed in Egypt, encouraging people to thank God repeatedly and to lead a modest and humble life. Jews therefore eat unleavened bread and bitter herbs on Passover in memory of what happened to the Israelites. And they eat unleavened bread for a week because if the eating were only for one day, Jews might not notice it.