Amr bin Shu'aib narrates from his father: It was asked from Sayyiduna Abdullah bin Amr about jewels, pearls, precious stones, small pearls (or Abyssinian pearls), and about plants that grow from the earth such as gems, pearls, stones, silk, vegetables, greens, cucumbers, etc. that grow from the earth. He replied: "There is no zakat obligatory on any stone, nor is zakat obligatory on vegetables. The Noble Prophet (peace be upon him) has made (the payment of) 'ushr obligatory only on wheat, barley, dates, and grapes."