Mishkat al-Masabih #2398

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.