When the illness of Messenger of Allah (ﷺ) became serious, he was asked about the leading of Salat and he said, "Ask Abu Bakr to lead Salat." Whereupon, 'Aishah (May Allah be pleased with her) said; "Abu Bakr is very tender hearted. He is bound to be overcome by weeping when he recites the Qur'an." Messenger of Allah (ﷺ) repeated, "Ask him (Abu Bakr) to lead Salat".

In another narration: 'Aishah (May Allah be pleased with her) said: "When Abu Bakr stands in your place, he will not be able to recite the Noble Qur'an to the people on account of weeping."

[Al-Bukhari and Muslim].