Quiver of Plenty

The quiver of plenty was a magical quiver capable of producing an unlimited number of +1 arrows.

It could be found in Baldur's Gate II: Shadows of Amn. It was in a locked, trapped cabinet in the first level of Watcher's Keep.

Operating from Cespenar's Forge in the Abyssal Fortress, the imp Cespenar was able to upgrade a quiver of plenty +1 to a quiver of plenty +2, producing unlimited +2 arrows, if given 10,000 gp and a rogue stone.

In-game description
"The history of this magical quiver has been long forgotten, though it likely had something to do with the inexplicable but well documented shortage of competent fletchers during the Time of Troubles."