" James eyed Matthew. “Thomas,” he said, in a low voice. “Maybe a healing rune?”
Thomas nodded and approached Matthew cautiously, as one might approach a stray cat on the street. Some time ago James had discovered that healing runes sobered Matthew up: not entirely, but enough.
“Push up your sleeve, then, there’s a good fellow,” Thomas said, seating himself on the arm of Matthew’s chair. “Let’s wake you up and James can tell us whatever mad thing he has planned.”
“It seems somehow blasphemous to use Marks to rid oneself of the effects of alcohol,” Matthew added, as Thomas put his stele away. The Mark in question gleamed, new-made, on Matthew’s wrist. He looked already more clear-eyed, and less as if he were about to fall asleep or be sick.
“I’ve seen you use your stele to part your hair,” said James dryly, as he began to examine the window locks.
“The Angel gave me this hair,” replied Matthew. “It’s one of the Shadowhunters’ gifts. Like the Mortal Sword.”
“Now that is blasphemy,” said Thomas. "

― Cassandra Clare , Chain of Gold (The Last Hours, #1)