Which companion is known by the title ‘Saifullah,’ meaning ‘Sword of Allah,’ due to his military prowess?

Explanation

– Khalid bin Waleed (RA), given the title ‘Saifullah,’ meaning ‘Sword of Allah,’ was renowned for his exceptional military strategy and leadership, remaining undefeated in every battle he commanded.
– He initially fought against the Muslims at the Battle of Uhud before later embracing Islam and becoming one of its most celebrated military commanders.
– For exams, note that Khalid bin Waleed (RA) played a decisive role in the successful conquests during the early caliphates of Abu Bakr and Umar (RA).