LILY (from off)
Not Harry! Please... have mercy... have mercy... not my son! Please – I’ll do anything.

VOLDEMORT (from off)
Avada Kedavra!

And it’s like lightning passes through HARRY’s body. He’s sent to the floor, a pure mess of grief.
And a noise like a shrunken scream descends and ascends around us.
And we just watch.
And slowly what was there is no longer there.
And the stage transforms and rotates.
And HARRY and his family and his friends are rotated off and away.

Harry Potter and the Cursed Child - Chapter 4 :
See this quote in the Pensive -