24. Various kinds of observance days for the Sangha, etc. At one time on the observance day, there were four monks staying in a certain monastery. “The Buddha has laid down a rule that the observance-day ceremony should be done. Now there’s four of us. So how should we do the observance-day ceremony?” They told the Buddha. “When there are four of you, you should recite the Monastic Code.” At one time on the observance day, there were three monks staying in a certain monastery. “The Buddha has instructed that the Monastic Code should be recited when there are four monks. But there’s only three of us. So how should we do the observance-day ceremony?” “When there are three of you, you should do the observance-day ceremony by declaring your purity. And you should do it like this.