[Machine] I heard the Messenger of Allah ﷺ saying, "If one of you gives the greeting of peace three times and is not answered, then let him go back, and I said, 'It is up to you to come to me with evidence of what you say, or I will do such and such to you, except that he had already promised him.'"

So Abu Musa came with a downcast face while I was sitting in a circle, and we said, "What is the matter with you?" He said, "I gave the greeting of peace to Umar and he informed me about his news. Did any of you hear from the Messenger of Allah ﷺ ?" They said, "Yes, all of us heard it from him." He said, "Then send someone with me until I come to Umar and inform him of that."  

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ إِذَا سَلَّمَ أَحَدُكُمْ ثَلَاثَ مَرَّاتٍ فَلَمْ يُجَبْ فَلْيَرْجِعْ فَقَالَ لَتَأْتِيَنِّي عَلَى مَا تَقُولُ بَيِّنَةً أَوْ لَأَفْعَلَنَّ بِكَ كَذَا غَيْرَ أَنَّهُ قَدْ أَوْعَدَهُ قَالَ فَجَاءَ أَبُو مُوسَى مُنْتَقِعًا لَوْنُهُ وَأَنَا فِي حَلْقَةٍ جَالِسٌ فَقُلْنَا مَا شَأْنُكَ؟ فَقَالَ سَلَّمْتُ عَلَى عُمَرَ فَأَخْبَرَنَا خَبَرَهُ فَهَلْ سَمِعَ أَحَدٌ مِنْكُمْ مِنْ رَسُولِ اللهِ ﷺ؟ قَالُوا نَعَمْ كُلُّنَا قَدْ سَمِعَهُ قَالَ فَأَرْسَلُوا مَعَهُ رَجُلًا مِنْهُمْ حَتَّى أَتَى عُمَرَ ؓ فَأَخْبَرَهُ بِذَلِكَ