Orb of Wisdom
The Orb of Wisdom was one of the nine original Orbs sent by the Prophets out of the Bajoran wormhole. 

It was one of the orbs confiscated by the Cardassians during the Occupation. In 2371, it was being held on Cardassia III, where Grand Nagus Zek acquired it. He later took it into the wormhole to contact the Prophets, hoping that their ability to exist out of space-time would enable him to make substantial profit. The Prophets found this to be confusing and changed Zek's attitude to that of the Ferengi of thousands of years ago. It was due to this that he wrote The Rules of Acquisition: Revised for the Modern Ferengi. Zek also planned to give the Orb of Wisdom to the Bajorans for free. After Quark had the Prophets restore him, Zek planned to make the Bajorans pay for the return of the Orb. ()

In 2373, Benjamin Sisko mentioned the Orb of Wisdom to Dulmur and Lucsly when describing the Orbs to the Department of Temporal Investigations agents. ()

Later that year, Kai Winn Adami consulted the Orb of Wisdom for guidance from the Prophets on the nonaggression pact the Dominion had offered Bajor. ()

See also 
Orb of Prophecy and Change
Orb of Time
Orb of Contemplation
Orb of the Emissary (not one of the original nine orbs)

External link
 

de:Drehkörper der Weisheit
Bajor
Religious items