Harry Potter and the Goblet of Fire
Sirius and Snape were eyeing each other with the utmost loathing.
"I will settle, in the short term," said Dumbledore, with a bite of impatience in his voice, "for a lack of open hostility. You will shake hands. You are on the same side now. Time is short, and unless the few of us who know the truth stand united, there is no hope for any of us.
Very slowly – but still glaring at each other as though each wished the other nothing but ill – Sirius and Snape moved toward each other and shook hands. They let go extremely quickly.
"That will do to be going on with," said Dumbledore, stepping between them once more." (36.178-80)