Question 1: In which year, following the Hijrah (Prophet’s migration to Madeenah), was Hajj made obligatory? What is the most authentic report in this regard?
Answer: Scholars have differed concerning the year in which Hajj was made obligatory. It was said that it was in the fifth year after Hijrah. Others said that it was in the sixth year after Hijrah. It was also said that it was in the ninth or tenth year after Hijrah… read more here.