HARRY
But you’ve seen something? You’ve divined something?

BANE
There is a black cloud around your son, a dangerous black cloud.

HARRY
Around Albus?

BANE
A black cloud that may endanger us all. You’ll find your son again, Harry Potter. But then you could lose him forever.

Harry Potter and the Cursed Child - Chapter 2 :
See this quote in the Pensive -