It's not funny, Jace," Alec interrupted, starting to his feet. "Are you just going to let her stand there and call me names?" "Yes," Jace said kindly. "It'll do you good-- try to think of it as endurance training.
Cassandra Clare (2010). “Cassandra Clare: The Mortal Instrument Series (3 books): City of Bones; City of Ashes; City of Glass”, p.69, Simon and Schuster