History of the Peloponnesian War

The news being brought to Hippias in the Cerameicum, he went not towards the place where the fact was committed, but presently unto those that were armed for the solemnity of the shows and were far off, that he might be with them before they heard of it; and composing his countenance [as well as he could] to dissemble the calamity, pointed to a certain place and commanded them to repair thither without their arms.

Which they did accordingly, expecting that he would have told them somewhat. But having commanded his guard to take those arms away, he then fell presently to picking out of such as he meant to question and whosoever else was found amongst them with a dagger. For with shields and spears to be in [the head of] the procession was of custom.