While I was present in one of the gatherings of the Ansar, Abu Musa came as if he was scared, and said, "I asked permission to enter upon ʿUmar three times, but I was not given the permission, so I returned." (When ʿUmar came to know about it) he said to Abu Musa, "Why did you not enter?'. Abu Musa replied, "I asked permission three times, and I was not given it, so I returned, for Messenger of Allah ﷺ said, "If anyone of you asks the permission to enter thrice, and the permission is not given, then he should return.' " ʿUmar said, "By Allah! We will ask Abu Musa to bring witnesses for it." (Abu Musa went to a gathering of the Ansar and said). "Did anyone of you hear this from the Prophet ﷺ ?" Ubai bin Kaʿb said, "By Allah, none will go with you but the youngest of the people (as a witness)." (Abu Saʿid) was the youngest of them, so I went with Abu Musa and informed ʿUmar that the Prophet ﷺ had said so. (See Hadith No. 277, Vol. 3)  

كُنْتُ فِي مَجْلِسٍ مِنْ مَجَالِسِ الأَنْصَارِ إِذْ جَاءَ أَبُو مُوسَى كَأَنَّهُ مَذْعُورٌ فَقَالَ اسْتَأْذَنْتُ عَلَى عُمَرَ ثَلاَثًا فَلَمْ يُؤْذَنْ لِي فَرَجَعْتُ فَقَالَ مَا مَنَعَكَ قُلْتُ اسْتَأْذَنْتُ ثَلاَثًا فَلَمْ يُؤْذَنْ لِي فَرَجَعْتُ وَقَالَ رَسُولُ اللَّهِ ﷺ إِذَا اسْتَأْذَنَ أَحَدُكُمْ ثَلاَثًا فَلَمْ يُؤْذَنْ لَهُ فَلْيَرْجِعْ فَقَالَ وَاللَّهِ لَتُقِيمَنَّ عَلَيْهِ بِبَيِّنَةٍ أَمِنْكُمْ أَحَدٌ سَمِعَهُ مِنَ النَّبِيِّ ﷺ فَقَالَ أُبَىُّ بْنُ كَعْبٍ وَاللَّهِ لاَ يَقُومُ مَعَكَ إِلاَّ أَصْغَرُ الْقَوْمِ فَكُنْتُ أَصْغَرَ الْقَوْمِ فَقُمْتُ مَعَهُ فَأَخْبَرْتُ عُمَرَ أَنَّ النَّبِيَّ ﷺ قَالَ ذَلِكَ وَقَالَ ابْنُ الْمُبَارَكِ أَخْبَرَنِي ابْنُ عُيَيْنَةَ حَدَّثَنِي يَزِيدُ عَنْ بُسْرٍ سَمِعْتُ أَبَا سَعِيدٍ بِهَذَا  

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).  

سَمِعْتُ أَبَا سَعِيدٍ الْخُدْرِيَّ يَقُولُ كُنْتُ جَالِسًا بِالْمَدِينَةِ فِي مَجْلِسِ الأَنْصَارِ فَأَتَانَا أَبُو مُوسَى فَزِعًا أَوْ مَذْعُورًا قُلْنَا مَا شَأْنُكَ قَالَ إِنَّ عُمَرَ أَرْسَلَ إِلَىَّ أَنْ آتِيَهُ فَأَتَيْتُ بَابَهُ فَسَلَّمْتُ ثَلاَثًا فَلَمْ يَرُدَّ عَلَىَّ فَرَجَعْتُ فَقَالَ مَا مَنَعَكَ أَنْ تَأْتِيَنَا فَقُلْتُ إِنِّي أَتَيْتُكَ فَسَلَّمْتُ عَلَى بَابِكَ ثَلاَثًا فَلَمْ يَرُدُّوا عَلَىَّ فَرَجَعْتُ وَقَدْ قَالَ رَسُولُ اللَّهِ ﷺ 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  

I was sitting in one of the meeting of the Ansar. Abu Musa came terrified. We asked him; what makes you terrified? He replied: ‘Umar sent for me; so I went to him and asked his permission three times, but he did not permit me (to enter), so I came back. He asked; what has prevented you from coming to me? I replied: I came and asked permission three times, but it was not granted to me (so I returned). The Messenger of Allah (May peace be upon him) has said: When one of you asks permission three times and it is not granted to him, he should go away. He (‘Umar’) said; establish the proof of it. So Abu Sa’id said: the youngest of the people will accompany you. So Abu Sa’id got up with him and testified.  

كُنْتُ جَالِسًا فِي مَجْلِسٍ مِنْ مَجَالِسِ الأَنْصَارِ فَجَاءَ أَبُو مُوسَى فَزِعًا فَقُلْنَا لَهُ مَا أَفْزَعَكَ قَالَ أَمَرَنِي عُمَرُ أَنْ آتِيَهُ فَأَتَيْتُهُ فَاسْتَأْذَنْتُ ثَلاَثًا فَلَمْ يُؤْذَنْ لِي فَرَجَعْتُ فَقَالَ مَا مَنَعَكَ أَنْ تَأْتِيَنِي قُلْتُ قَدْ جِئْتُ فَاسْتَأْذَنْتُ ثَلاَثًا فَلَمْ يُؤْذَنْ لِي وَقَدْ قَالَ رَسُولُ اللَّهِ ﷺ إِذَا اسْتَأْذَنَ أَحَدُكُمْ ثَلاَثًا فَلَمْ يُؤْذَنْ لَهُ فَلْيَرْجِعْ قَالَ لَتَأْتِيَنِّي عَلَى هَذَا بِالْبَيِّنَةِ قَالَ فَقَالَ أَبُو سَعِيدٍ لاَ يَقُومُ مَعَكَ إِلاَّ أَصْغَرُ الْقَوْمِ قَالَ فَقَامَ أَبُو سَعِيدٍ مَعَهُ فَشَهِدَ لَهُ  

[Machine] I was in a gathering of the Ansar, then Abu Musa came to us looking scared. He said, "Omar ordered me to come to him, so I went to him and sought permission three times, but he did not give me permission, so I returned." The Messenger of Allah ﷺ had said, "Whoever seeks permission three times and is not given permission, then let him go back." Abu Said said, "So Abu Musa came to us scared or startled and said, 'I seek your testimony.' Ubayy ibn Ka'b said, 'No one should go with you except the least of us.' Abu Said said, 'And I was the least among them, so I went with him and testified that the Messenger of Allah ﷺ said, 'Whoever seeks permission three times and is not given permission, then let him go back.'"  

كُنْتُ فِي حَلْقَةٍ مِنْ حِلَقِ الْأَنْصَارِ فَجَاءَنَا أَبُو مُوسَى كَأَنَّهُ مَذْعُورٌ فَقَالَ إِنَّ عُمَرَ أَمَرَنِي أَنْ آتِيَهُ فَأَتَيْتُهُ فَاسْتَأْذَنْتُ ثَلَاثًا فَلَمْ يُؤْذَنْ لِي فَرَجَعْتُ وَقَدْ قَالَ ذَلِكَ رَسُولُ اللهِ ﷺ مَنْ اسْتَأْذَنَ ثَلَاثًا فَلَمْ يُؤْذَنْ لَهُ فَلْيَرْجِعْ فَقَالَ لَتَجِيئَنَّ بِبَيِّنَةٍ عَلَى الَّذِي تَقُولُ وَإِلَّا أَوْجَعْتُكَ قَالَ أَبُو سَعِيدٍ فَأَتَانَا أَبُو مُوسَى مَذْعُورًا أَوْ قَالَ فَزِعًا فَقَالَ أَسْتَشْهِدُكُمْ فَقَالَ أُبَيُّ بْنُ كَعْبٍ لَا يَقُومُ مَعَكَ إِلَّا أَصْغَرُ الْقَوْمِ قَالَ أَبُو سَعِيدٍ وَكُنْتُأَصْغَرَهُمْ فَقُمْتُ مَعَهُ وَشَهِدْتُ أَنَّ رَسُولَ اللهِ ﷺ قَالَ مَنْ اسْتَأْذَنَ ثَلَاثًا فَلَمْ يُؤْذَنْ لَهُ فَلْيَرْجِعْ