An Important Admonishment
At another instance, Hazrat Musleh-e-Maud (ra) states in relation to Hazrat Ali (ra):
“It is mentioned in the hadith that once, while the Holy Prophet (sa) was reciting the Holy Quran [during prayer], Hazrat Ali (ra) reminded him of a certain portion. After the prayer had concluded, the Holy Prophet (sa) said to Hazrat Ali (ra), ‘It was not your duty to do so; I have appointed certain people to remind me if I ever make a mistake.’”
(Khutbat-e-Mahmud, Vol. 33, p. 299)
The Holy Prophet (sa) was reciting the Holy Quran during prayer when he missed a portion, upon which Hazrat Ali (ra) reminded him. The Holy Prophet (sa) told him that he had already appointed certain people for this task and so Hazrat Ali (ra) did not need to, despite the fact that Hazrat Ali (ra) was quite learned as well.