In relaying the story when B'nai Israel arrived at Mt. Sinai, the Torah mentions 3 cycles of G-d speaking to Moses to tell B'nai Isra'el something. You usually see a few verses of G-d saying something followed by Moses going to relay that to the people except for one instance. All verses are from Shemot chapter 19.
Verses 3 - 6 First time G-d speaks to Moses.
Verses 7 - 8 Moses speaks to the people, and returns to G-d
Verse 9 Beginning of verse, G-d speaks to Moses. At the end of the verse, it says "Moses returned the people's words to G-d".
This is the exception. Why don't we see any mention of Moses speaking to the people or knowing what they actually said?
- Verses 10 - 13 G-d commands Moses to tell the people to prepare themselves and cordon part of Mt. Sinai.
Verse 14 - 15 Moses returns and tells them to prepare themselves for 3 days.