If your combat level 25+ then I would recommend that u go to varrok and fight guards tht a level 21 and they wil drop 3 grapes every once in a while.
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Buy them on the Grand Exchange. Another option is to kill guards around Varrock - they drop grapes.
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Go to the Grand Exchange and buy them.. i think they also might be in the cooking guild EAt them and you will poo them out!
A chicken, that can be found in Lumbridge.
Osman can be found north of the palace in Al-Kharid.