al-Ma'thur, also known as "Ma'thur al-Fijar" is the sword which was owned by the prophet Muhammad before he received his first revelations in Mecca. It was willed to him by his father. The prophet Muhammad migrated with the sword from Mecca to Medina, and the sword remained with him until it was transferred, along with other war equipment, to Ali b. Abi Talib.

The blade is 99 cm in length. The handle is of gold in the shape of two serpents, and is encrusted with emeralds and turquoise. Near the handle is a Kufic inscription saying: 'Abdallah b. 'Abd al-Muttalib. Today the sword is housed in the Topkapi Museum, Istanbul. Photograph taken from Muhammad Hasan Muhammad al-Tihami, Suyuf al-Rasul wa 'uddah harbi-hi (Cairo: Hijr, 1312/1992).