(1) باب
Narrated 'Aishah:
The revelation came down to Messenger of Allah (ﷺ) and he recited to is: "A surah which We have sent down and which We have ordained (faradnaha)"Abu Dawud said: The letter ra (r) is the word faradnaha has short vowel a (with out doubling of consonant r), and then he reached the verses after this verse.
Reference: Sunan Abi Dawud 4008
In-book reference: Book 32, Hadith 40
English translation: Book 31, Hadith 3997