CJ18

So I'm doing a re-read right now, and just finished OB, I just realised that the knowledge of Gavilar's vision is already commonly known, but I forgot and missed in what book or chapter that knowledge is shown to the reader or to other character (especially Dalinar) I tried to find it but the only mention I found is in WoR when Graves mention Gavilar's vision, can you guys help me point out what chapter when Gavilar's vision first mentioned to the reader and the first time it's known to other character as well.