This is about the physical seal (signet ring). For the title given to Muhammad, see  Seal of the Prophets. For the mole or physical mark attributed to Muhammad, see Seal of Prophethood.

The Seal of Muhammad (Turkish Muhr-e-Saadet or Muhr-e-Sarif; Arabic ) is one of the relics of Muhammad kept in the Topkapi Palace by the Ottoman Sultans as part of the Sacred Relics collection. It is allegedly the replica of a seal used by Muhammad on several letters sent to foreign dignitaries.