Khalid ibn al-Walid (May Allah be pleased with him)

Qurashi commander who after conversion served the Prophet and the first caliphs in major military roles.

He was al-Walid’s son of Quraysh’s Makhzum and had fought against Muslims before Islam.

After conversion his skills served Muslim forces, marking a clear transition in his life.

At Mutah he took the standard after three designated leaders died; Bukhari 3757 and 4262 call him a sword of Allah.

This underlies the epithet Sayf Allah and concerns service during the Prophet’s lifetime.

Under the first caliphs he held major roles in Arabia, Iraq and Syria.

Accounts describe continued service after command changes; his epithet does not make every decision infallible.

Biography describes death from illness rather than on the battlefield, commonly dated 21 AH.

Hims and Madinah are reported locations; his career extends beyond a single battle.