Members of the 5th DL have been in contact with the Prophet for a great many years, perhaps even decades, though they only know of him through his voice. He has aided many of their decisions of policy with his auguries (which tends to really get under their skin at the time) and even quelched their decided lack or restraint on occassion, a rare occasion perhaps, but it has happened.
When asked of his beginnings of a prophet, only a vague smile could be seen through the darkness of his hood and he only chuckled slightly. When further pressed, he raised a finger at Lazarus saying, "You're messing with things you are better off not knowing" and chuckled again.
Frustrated with the whole thing, Laz went off on his merry way, determined not to let the seer get to him next time and vowing to get the upper hand on the prophet on the next go around ...