(492) بَابُ الاسْتِئْذَانِ ثَلاثًا
'Ubayd ibn 'Umayr reported that Abu Musa al-Ash'ari asked permissionof 'Umar ibn al-Khattab, but he did not grant him permission. It seemedthat he was busy. Abu Musa came back and 'Umar had finished. He said, "Didn'tI hear the voice of 'Abdullah ibn Qays? Give him permission to enter."He was told, "He has gone away," so he sent after him. Abu Musa said, "Wewere commanded to behave like that (i.e. to go away after having askedpermission to enter three times)." 'Umar said, "Bring me a clear proofof it." He then went to the gathering of the Ansar and questioned them.They said, "Only the youngest of us will attest to that - Abu Sa'idal-Khudri." He went with Abu Sa'id. 'Umar said, "Is something of what themay Allah bless him and grant him peace,, may Allah bless him and granthim peace, commanded hidden from me? Doing business in the markets distractedme," i.e. going out to trade.
Reference: Al-Adab Al-Mufrad 1065
In-book reference: Book 43, Hadith 15
English translation: Book 43, Hadith 1065