Hadith 6066
Abu Bakra told that a man said to God's messenger, "I saw as though a scale descended from the sky. You and Abu Bakr were weighed and you were heavier Abu Bakr and `Umar were weighed and Abu Bakr was heavier; `Umar and `Uthman were weighed and `Umar was heavier; then the scale was taken up." God's messenger was grieved about that, meaning that what the man told him grieved him. He then said, "There will be a caliphate on the model of prophecy, then God will give the kingdom to whom He wills." Tirmidhi and Abu Dawud transmitted it.
إِن سلم من عنعنة الْحسن الْبَصْرِيّ) وَعَن أبي بكرَة أَنَّ رَجُلًا قَالَ لِرَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: رَأَيْتُ كَأَنَّ مِيزَانًا نَزَلَ مِنَ السَّمَاءِ فَوُزِنْتَ أَنْتَ وَأَبُو بَكْرٍ فَرَجَحْتَ أَنْتَ وَوُزِنَ أَبُو بَكْرٍ وَعُمَرُ فَرَجَحَ أَبُو بَكْرٍ وَوُزِنَ عُمَرُ وَعُثْمَانُ فَرَجَحَ عُمَرُ ثُمَّ رُفِعَ الْمِيزَانُ " فَاسْتَاءَ لَهَا رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَعْنِي فَسَاءَهُ ذَلِكَ. فَقَالَ: «خِلَافَةُ نُبُوَّةٍ ثُمَّ يُؤْتِي اللَّهُ الْمُلْكَ مَنْ يَشَاءُ» . رَوَاهُ التِّرْمِذِيّ وَأَبُو دَاوُد