When the Prophet, became ill in his fatal illness, Someone came to inform him about the prayer, and the Prophet ﷺ told him to tell Abu Bakr to lead the people in the prayer. I said, "Abu Bakr is a softhearted man and if he stands for the prayer in your place, he would weep and would not be able to recite the Qur'an." The Prophet ﷺ said, "Tell Abu Bakr to lead the prayer." I said the same as before. He (repeated the same order and) on the third or the fourth time he said, "You are the companions of Joseph. Tell Abu Bakr to lead the prayer." So Abu Bakr led the prayer and meanwhile the Prophet ﷺ felt better and came out with the help of two men; as if I see him just now dragging his feet on the ground. When Abu Bakr saw him, he tried to retreat but the Prophet ﷺ beckoned him to carry on. Abu Bakr retreated a bit and the Prophet ﷺ sat on his (left) side. Abu Bakr was repeating the Takbir (Allahu Akbar) of Messenger of Allah ﷺ for the people to hear. (Using translation from Bukhārī 712)   

لَمَّا مَرِضَ رَسُولُ اللهِ ﷺ مَرَضَهُ الَّذِي مَاتَ فِيهِ أَتَاهُ بِلَالٌ يُؤْذِنُهُ بِالصَّلَاةِ فَقَالَ مُرُوا أَبَا بَكْرٍ فَيُصَلِّيَ بِالنَّاسِ فَقَالَتْ إِنَّ أَبَا بَكْرٍ رَجُلٌ أَسِيفٌ وَإِنَّهُ إِنْ يَقُمْ مَقَامَكَ يَبْكِ فَلَا يَقْدِرُ عَلَى الْقِرَاءَةِ فَقَالَ مُرُوا أَبَا بَكْرٍ فِي الثَّالِثَةِ أَوْ فِي الرَّابِعَةِ إِنَّكُنَّ صَوَاحِبُ يُوسُفَ مُرُوا أَبَا بَكْرٍ فَيُصَلِّيَ بِالنَّاسِ فَقَامَ أَبُو بَكْرٍ ؓ فَصَلَّى بِالنَّاسِ وَخَرَجَ رَسُولُ اللهِ ﷺ يُهَادَى بَيْنَ رَجُلَيْنِ كَأَنِّي أَنْظُرُ إِلَيْهِ يَخُطُّ بِرِجْلَيْهِ الْأَرْضَ فَلَمَّا رَآهُ أَبُو بَكْرٍ ذَهَبَ يَتَأَخَّرُ فَأَشَارَ إِلَيْهِ أَنْ صَلِّ فَقَامَ أَبُو بَكْرٍ وَقَعَدَ رَسُولُ اللهِ ﷺ إِلَى جَنْبِهِ يُصَلِّي وَأَبُو بَكْرٍ يُسْمِعُ النَّاسَ  

[Machine] The Messenger of Allah ﷺ entered into prayer, then he motioned to them (his companions) to stay in their places. He went into his house and then came out with his head dripping water. He entered into prayer and prayed with them. When he finished the prayer, he said, "Indeed, I am only a human being, and I had a state of impurity."  

أَنَّ رَسُولَ اللهِ ﷺ دَخَلَ فِي الصَّلَاةِ ثُمَّ أَوْمَأَ إِلَيْهِمْ أَنْ مَكَانَكُمْ ثُمَّ دَخَلَ بَيْتَهُ ثُمَّ خَرَجَ وَرَأْسُهُ يَقْطُرُ فَدَخَلَ فِي الصَّلَاةِ فَصَلَّى بِهِمْ فَلَمَّا قَضَى الصَّلَاةَ قَالَ إِنَّمَا أَنَا بَشَرٌ وَإِنِّي كُنْتُ جُنُبًا