Abu Huraira told that God's messenger addressed them saying,“Pilgrimage (In what follows I have used the word "pilgrimage”where only the hajj is intended; but when reference is made to both hajj and ’umra the Arabic words are used without translation to avoid misunderstanding.) has been ordained for you people, so perform it.”A man asked whether it should be performed annually, but God’s messenger gave no reply till he had asked the question three times. Then he said,“If I were to say that it should, it would be obligatory and you would not be able to perform it,”after which he said,“Leave me alone as long as I have said nothing to you, for your predecessors perished simply on account of their much questioning and their disagreement with their prophets. But when I command you to do anything, obey it as much as you can; and when I forbid you to do anything, leave it alone.”Muslim transmitted it.