Quote from : City of Glass Book

Alec?" Magnus was staring at him. He had dispatched the remaining Iblis demons, and the square was empty but for the two of them. "Did you just- did you just save my life?" Alec knew he ought to say something like, Of course, because I'm a Shadowhunter and that's what we do, or That's my job. Jace would have said something like that. Jace always knew the right thing to say. But the words that actually came out of Alec's mouth where quite different- and sounded petulant, even to his own ears. "You never called me back," he said. "I called you so many times and you never called me back." Magnus looked at Alec as if he'd lost his mind. "Your city is under attack," he said. "The wards have broken, and the streets are full of demons. And you want to know why I haven't called you?