Reference for Megillah 3:9

האי מיבעיא ליה לגופיה א"כ לימא קרא זמן מאי זמניהם זמנים טובא

But this text is required for its literal meaning! If that were the case, it [the Megillah] could have simply stated ‘at the [appointed] time’. What then is implied by ‘their times’? A large number of ‘times’!

Jastrow