So — you know the incantation, let me see what you can do…’
’Don’t Stun them, Filch!’ shouted Umbridge angrily, for all the world as though it had been his incantation.
As small groups of students were called forwards in alphabetical order, those left behind muttered incantations and practised wand movements, occasionally poking each other in the back or eye by mistake.
He turned his wand backwards towards the man’s side, but had no breath to utter an incantation, and the man’s free hand was groping towards the hand in which Harry was grasping the prophecy — ’AARGH!’
The curse Dolohov had used on her, though less effective than it would have been had he been able to say the incantation aloud, had nevertheless caused, in Madam Pomfrey’s words, ’quite enough damage to be going on with’.
His Levitation Charm was certainly much better than Malfoy’s had been, though he wished he had not mixed up the incantations for Colour Change and Growth Charms, so that the rat he was supposed to be turning orange swelled shockingly and was the size of a badger before Harry could rectify his mistake.
None of the fifth-years talked very much at breakfast next day, either: Parvati was practising incantations under her breath while the salt cellar in front of her twitched; Hermione was rereading Achievements in Charming so fast that her eyes appeared blurred; and Neville kept dropping his knife and fork and knocking over the marmalade.
Harry turned over his paper, his heart thumping hard — three rows to his right and four seats ahead Hermione was already scribbling — and lowered his eyes to the first question: a) Give the incantation and b) describe the wand movement required to make objects fly.
There are no more uses of "incantation" in the book.
Show samples from other sources
She believes in the power of magical incantations.
Harry Potter says the incantation, "expecto patronum" as he focuses on a happy memory to summon protection from dark magic.