SCORPIUS
Your dad thinks the rumours are true – I am the son of Voldemort?

ALBUS (nods)
His department are currently investigating it.

SCORPIUS
Good. Let them. Sometimes – sometimes I find myself thinking – maybe they’re true too.

ALBUS
No. They’re not true. And I’ll tell you why. Because I don’t think Voldemort is capable of having a kind son – and you’re kind, Scorpius. To the depths of your belly, to the tips of your fingers. I truly believe Voldemort – Voldemort couldn’t have a child like you.

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