(19) بَابُ قَوْلِ اللَّهِ تَعَالَى: {لَقَدْ كَانَ فِي يُوسُفَ وَإِخْوَتِهِ آيَاتٌ لِلسَّائِلِينَ}
Narrated Abu Musa:
When the Prophet (ﷺ) fell ill, he said, "Order Abu Bakr to lead the people in prayer." `Aisha said, "Abu Bakr is a soft-hearted person. The Prophet (ﷺ) gave the same order again and she again gave the same reply. He again said, "Order Abu Bakr (to lead the prayer)! You are (like) the female companions of Joseph." Consequently Abu Bakr led the people in prayer in the life-time of the Prophet.
Reference: Sahih al-Bukhari 3385
In-book reference: Book 60, Hadith 59
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 55, Hadith 599