Hazrat Muhammad (SAW) had several swords, but the most famous ones were:
Azb (أزب): Also known as Azab, it was a sword given to him by his cousin, Ali ibn Abi Talib (RA).
Zulfiqar (ذو الفقار): This was a sword given to him by Allah (SWT) through the angel Jibril (AS) and was considered a divine gift. It was also used by Ali ibn Abi Talib (RA) in the Battle of the Trench.