Sinai is the covenant's legal moment: a whole people, not a prophet, receives the revelation, and the tradition insists on that detail because it makes the covenant collective and unmediated. A famous midrash has God suspending the mountain overhead — accept, or be buried here — which the rabbis themselves flag as a problem for consent, and answer by saying the covenant was freely reaffirmed centuries later. Another tradition holds that every Jewish soul who would ever live was present, which is how conversion is explained: the convert's soul was there too.