Which companion, originally from Persia, is known for suggesting the strategy of digging a trench during the Battle of Khandaq?

Explanation

– Salman al-Farsi (RA), originally from Persia, suggested the innovative strategy of digging a trench around Madinah during the Battle of Khandaq, a tactic largely unfamiliar to Arabian warfare at the time.
– His diverse background and knowledge of Persian military tactics contributed significantly to this successful defensive strategy against the coalition forces.
– For exams, note that Salman al-Farsi (RA) underwent a long spiritual journey through multiple faiths before eventually embracing Islam.