Final answer:
If it were raining on the first night of Sukkot, individuals would be exempt from the requirement to dwell in the sukkah and could remain indoors until the rain stops, due to the stipulation against discomfort.
Step-by-step explanation:
On the first night of Sukkot, if it were raining, traditional Jewish practice would allow for an exception to the commandment of dwelling in the sukkah. As Sukkot is a festival that commemorates the Israelites' dwellings in temporary huts during their 40 years of wandering in the desert after the Exodus from Egypt, living in a sukkah is a central observance of the holiday. However, the requirement to dwell in a sukkah has the stipulation that it should not cause discomfort, so if it were raining on the first night, individuals would be exempt from staying in the sukkah and could stay indoors until the rain stops.