'Ubayd ibn Hunayn related to him that Abu Musa said, "I asked permission three times to come in to 'Umar, but he did not give me permission and so I went away. He said, ''Abdullah, is it hard on you to be kept waiting at your door.' I said, 'I asked permission from you three times and you did not give me permission, so I went away (and we were commanded to do that).' 'Umar said, 'From whom did you hear this?' I replied, 'I heard it from the Prophet, may Allah bless him and grant him peace.' 'Umar said, 'Did you hear something from the Prophet ﷺ which I did not hear? If you do not bring me a clear proof, I will make an example of you!' Therefore I went to a group of Ansar who were sitting in the mosque. I asked them and they said, 'Does anyone doubt this?' I told them what 'Umar had said. They said, 'Only the youngest of us will go with you.' So Abu Sa'id al-Khudri - or Abu Mas'ud - went with me to 'Umar. He said, 'We went out with the Prophet ﷺ when he was going to Sa'd ibn 'Ubada. He gave the greeting, but Sa'd did not give permission. Then he greeted him a second time and then a third time, but Sa'd did not give him permission. So the Prophet said, 'We have done what we must.' Then he went back and Sa'd caught up to him and said, 'Messenger of Allah! By the One who sent you with the Truth, every time you greeted me, I heard and answered you, but I wanted to have a lot of greeting (peace) from you for me and the people of my house.'" Abu Musa said, "By Allah, I am a guardian of the hadith of the Messenger of Allah, may Allah bless him and grant him peace." 'Umar said, "Yes, but I wanted to make sure."

حَدَّثَنَا عَبْدُ اللهِ بْنُ صَالِحٍ قَالَ: حَدَّثَنِي اللَّيْثُ، عَنْ خَالِدِ بْنِ يَزِيدَ، عَنْ سَعِيدِ بْنِ أَبِي هِلاَلٍ، عَنْ مَرْوَانَ بْنِ عُثْمَانَ، أَنَّ عُبَيْدَ بْنَ عُمَيْرٍ أَخْبَرَهُ، عَنْ أَبِي مُوسَى قَالَ: اسْتَأْذَنْتُ عَلَى عُمَرَ، فَلَمْ يُؤْذَنْ لِي ثَلاَثًا، فَأَدْبَرْتُ، فَأَرْسَلَ إِلَيَّ فَقَالَ: يَا عَبْدَ اللهِ، اشْتَدَّ عَلَيْكَ أَنْ تُحْتَبَسَ عَلَى بَابِي؟ اعْلَمْ أَنَّ النَّاسَ كَذَلِكَ يَشْتَدُّ عَلَيْهِمْ أَنْ يُحْتَبَسُوا عَلَى بَابِكَ، فَقُلْتُ: بَلِ اسْتَأْذَنْتُ عَلَيْكَ ثَلاَثًا، فَلَمْ يُؤْذَنْ لِي، فَرَجَعْتُ، فَقَالَ: مِمَّنْ سَمِعْتَ هَذَا؟ فَقُلْتُ: سَمِعْتُهُ مِنَ النَّبِيِّ ﷺ، فَقَالَ: أَسَمِعْتَ مِنَ النَّبِيِّ ﷺ مَا لَمْ نَسْمَعْ؟ لَئِنْ لَمْ تَأْتِنِي عَلَى هَذَا بِبَيِّنَةٍ لَأَجْعَلَنَّكَ نَكَالاً، فَخَرَجْتُ حَتَّى أَتَيْتُ نَفَرًا مِنَ الأَنْصَارِ جُلُوسًا فِي الْمَسْجِدِ فَسَأَلْتُهُمْ، فَقَالُوا: أَوَيَشُكُّ فِي هَذَا أَحَدٌ؟ فَأَخْبَرْتُهُمْ مَا قَالَ عُمَرُ، فَقَالُوا: لاَ يَقُومُ مَعَكَ إِلاَّ أَصْغَرُنَا، فَقَامَ مَعِي أَبُو سَعِيدٍ الْخُدْرِيُّ، أَوْ أَبُو مَسْعُودٍ، إِلَى عُمَرَ، فَقَالَ: خَرَجْنَا مَعَ النَّبِيِّ ﷺ وَهُوَ يُرِيدُ سَعْدَ بْنَ عُبَادَةَ، حَتَّى أَتَاهُ فَسَلَّمَ، فَلَمْ يُؤْذَنْ لَهُ، ثُمَّ سَلَّمَ الثَّانِيَةَ، ثُمَّ الثَّالِثَةَ، فَلَمْ يُؤْذَنْ لَهُ، فَقَالَ: قَضَيْنَا مَا عَلَيْنَا، ثُمَّ رَجَعَ، فَأَدْرَكَهُ سَعْدٌ فَقَالَ: يَا رَسُولَ اللهِ، وَالَّذِي بَعَثَكَ بِالْحَقِّ مَا سَلَّمْتَ مِنْ مَرَّةٍ إِلاَّ وَأَنَا أَسْمَعُ، وَأَرُدُّ عَلَيْكَ، وَلَكِنْ أَحْبَبْتُ أَنْ تُكْثِرَ مِنَ السَّلاَمِ عَلَيَّ وَعَلَى أَهْلِ بَيْتِي، فَقَالَ أَبُو مُوسَى: وَاللَّهِ إِنْ كُنْتُ لَأَمِينًا عَلَى حَدِيثِ رَسُولِ اللهِ ﷺ، فَقَالَ: أَجَلْ، وَلَكِنْ أَحْبَبْتُ أَنْ أَسْتَثْبِتَ.