Twenty Years After by Alexandre Dumas Chapter 5 Page 7

In former days I had not only three friends, I had thirty; at two-and-twenty one calls every man one’s friend.”

“Well, sir,” returned Mazarin, “prudence is a fine thing, but to-day you might regret having been too prudent.”

“My lord, Pythagoras made his disciples keep silence for five years that they might learn to hold their tongues.”

“But you have been silent for twenty years, sir. Speak, now the queen herself releases you from your promise.”

“The queen!” said D’Artagnan, with an astonishment which this time was not pretended.

“Yes, the queen! And as a proof of what I say she commanded me to show you this diamond, which she thinks you know.”