Which Sikh article of faith is a ceremonial sword?

The Sikh article of faith that is a ceremonial sword is the kirpan.

The kirpan is one of the five articles of faith traditionally worn by initiated Sikhs who belong to the Khalsa. Its name is commonly linked to ideas of mercy, grace, and honour, while its sword form symbolizes the duty to oppose injustice and protect the vulnerable.

A kirpan is not intended simply as an ornament. Sikh teaching connects it with responsibility, courage, and readiness to defend righteousness. In practice, kirpans vary in size and design, and regulations governing their carrying differ between countries and institutions.

The kirpan is often confused with the kara, the steel bracelet, or the kanga, the small comb. The five articles are commonly remembered through their traditional names beginning with the letter K, although each has a different religious and practical meaning.