The haj, one of the five pillars of Islam

Muslims will on Wednesday embark on the annual haj pilgrimage, one of the five pillars of Islam, which this year takes place on a greatly reduced scale due to the coronavirus pandemic.

source https://timesofindia.indiatimes.com/world/middle-east/the-haj-one-of-the-five-pillars-of-islam/articleshow/77189381.cms