“After the seven days” — What is the nature of these seven days? That the Holy One, blessed be He, gave them a taste of the World to Come, so that they would know what goodness they had forfeited.
On the daf / in context: The seven days are understood as a final period of abundance and pleasure granted so that the generation would fully appreciate the loss that was about to come upon them.
Type of Learning
Custom (the seven days as a pedagogical foretaste of lost goodness).
What Is Learned
Hashem granted the generation seven days of heightened pleasure so they would know the goodness they were about to lose.