Goblet of Fire
Chapter 35
Veritaserum
He stepped into the office, placed a foot
underneath Moody's unconscious body, and kicked him over onto his back,
so that his face was visible. Snape followed him, looking into the Foe-Glass, where his own face was still visible, glaring into the room. Professor McGonagall went straight to Harry.
pg 679
Snape handed Dumbledore a small glass bottle
of completely clear liquid: the Veritaserum with which he had
threatened Harry in class. Dumbledore got up, bent over the man on the
floor, and pulled him into a sitting position against the wall beneath the Foe-Glass, in which the reflections of Dumbledore, Snape, and McGonagall were still glaring down upon them all.
pg 683