Professor McGonagall dropped the Sorting Hat
onto her head, and barely a second after it had touched
the dark red hair, the hat cried, “Gryffindor!”
Harry heard Snape let out a tiny groan. Lily took off the hat,
handed it back to Professor McGonagall, then hurried toward the cheering Gryffindors, but as she went she glanced back at Snape, and there was a sad little smile on her face.
Harry Potter and the Deathly Hallows - The Prince’s Tale Page 672