Abu Yunus, the freed slave of 'A'isha said: 'A'isha ordered me to transcribe a copy of the Qur'an for her and said: When you reach this verse: "Guard the prayers and the middle prayer" (ii. 238), inform me; so when I reached it, I informed her and she gave me dictation (like this): Guard the prayers and the middle prayer and the afternoon prayer, and stand up truly obedient to Allah. 'A'isha said: This is how I have heard from the Messenger of Allah (ﷺ) .
Hadith Referenceصحيح مسلم / كتاب المساجد ومواضع الصلاة / 629
'A'isha reported that a person came to the Apottle of Allah (ﷺ) asking for a fatwa (religious verdict). She ('A'isha) had been overhearing it from behind the curtain. 'A'isha added that he (the person) had said: Messenger of Allah, (the time) of prayer overtakes me as I am in a state of junub; should I observe fast (in this state)? Upon this the Messenger of Allah (ﷺ) said: At times, the time of prayer overtakes me while I am in a state of junub, and I observe fast (in that very state), whereupon he said: Messenger of Allah, you are not like us Allah has pardoned all your sins, the previous ones and the later ones. Upon this he (the Holy Prophet) said: By Allah, I hope I am the most God-fearirg of you, and possess the best knowledge among you of those (things) against which I should guard.