Searching for a quote by Achamian in PoN

I want the entire excerpt if possible, or pointed in the right direction. I believe it's in Warrior Prophet but it's been ages and could be in Thousandfold Thought

It's a section discussing Proyas as a young boy under Achamian's tutelage. Achamian told him to listen to people, told him three words that people are typically loathe to say or admit to, three words that had Achamian banished from Atyersus for blaspheming when Proyas asked him if the gods are real and Achamian replied: "I don't know.", saying the words himself to try and teach the boy an important lesson despite knowing it could very well be the last thing he taught Proyas.

It's been far too long since I've read these books, been trying to stick to lighter, more jovial things. Much gratitude to any who takes the time to help me find this.

Edit: Thanks! Saved me a lot of time trying to find it on audible. Reading this has me wanting to give it another listen but I've got multiple series on backlog. Love the way Bakker writes so much though.