إِذَا اسْتَأْذَنَ أَحَدُكُمْ ثَلاَثًا فَلَمْ يُؤْذَنْ لَهُ فَلْيَرْجِعْ " . فَقَالَ عُمَرُ أَقِمْ عَلَيْهِ الْبَيِّنَةَ وَإِلاَّ أَوْجَعْتُكَ . فَقَالَ أُبَىُّ بْنُ كَعْبٍ لاَ يَقُومُ مَعَهُ إِلاَّ أَصْغَرُ الْقَوْمِ . قَالَ أَبُو سَعِيدٍ قُلْتُ أَنَا أَصْغَرُ الْقَوْمِ . قَالَ فَاذْهَبْ بِهِ
Abu Sa'id Khudri reported: I was sitting in Medina in the company of the Ansar when Abu Musa came trembling with fear. We said to him: What is the matter? He said: 'Umar (Allah be pleased with him) sent for me. I went to him and paid him salutation thrice at (his) door but he made no response to me and so I came back. Thereupon he ('Umar) said: What stood in your way that you did not turn up? I said: I did come to you and paid you salutations at your door three times but I was not given any response, so I came back as the Messenger of Allah (ﷺ) has said: When any one of you seeks permission three times and he is not granted permission, he should come back. Umar said: Bring a witness to support that you say, otherwise I shall take you to task. Ubayy b. Ka'b said: None should stand with him (as a witness) but the youngest amongst the people. Abu Sa'id said: I am the youngest amongst the people, whereupon he said: Then you go with him (to support his contention).
مواضع دراسته في كتب التخريج والشروح
المنهاج في شرح صحيح مسلم بن الحجاجج١٤ ص٣٠٨·كِتَاب الْآدَابِ
المفهم لما أشكل من تلخيص مسلمج٥ ص٤٧٣·كتاب الأدب
شرح مشكل الآثارج٤ ص٢٤٤·بَابٌ بَيَانُ مُشْكِلِ مَا رُوِيَ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي الِاسْتِئْذَانِ كَمْ هُوَ مِنْ مَرَّةٍج٤ ص٢٤٤·بَابٌ بَيَانُ مُشْكِلِ مَا رُوِيَ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي الِاسْتِئْذَانِ كَمْ هُوَ مِنْ مَرَّةٍج٤ ص٢٤٤·بَابٌ بَيَانُ مُشْكِلِ مَا رُوِيَ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي الِاسْتِئْذَانِ كَمْ هُوَ مِنْ مَرَّةٍ
إتحاف المهرة بالفوائد المبتكرة من أطراف العشرةج١٠ ص١١٨·عَبْدِ اللَّهِ بْنِ قَيْسٍ أَبُو مُوسَى الْأَشْعَرِيُّج٥ ص١٧٢·أبو سَعِيدٍ الْخُدْرِيِّ
تحفة الأشراف بمعرفة الأطرافج٣ ص٣٣٣·حرف السين