Note / Clarification: In manuscripts ('A) and (B) this word has been corrupted into "qurrah" (singular), while the text adopted from manuscripts (Z) and (S) is what is correct in this hadith (the hadith of Abu Hurayrah). For Abu Mu'awiyah stated explicitly in his narration from al-A'mash, from Abu Salih, that Abu Hurayrah used to read it (قرَّات أعيُن) in the plural. Ibn Majah (4328) recorded it, and al-Bukhari cited it without a chain (mu'allaq) after (4780). In this way he attributed this reading to Abu Hurayrah and did not narrate it as marfu'. It is a "shadh" reading, which Ibn Jinni mentioned in "al-Muhtasab" 2/ 174, while the reading of the majority is "qurrah" (singular).

Grading: Its chain is strong.
Details of the narration: Abu Salih here is "Dhakwan al-Samman".

Reference / Source: This report is a portion of a hadith that Ahmad 16/ (10423), al-Bukhari (4780), Muslim (2824), and Ibn Majah (4328) narrated by various routes from al-A'mash, with this same chain.

Reference / Source: Ahmad 15/ (9649), al-Tirmidhi (3292), and al-Nasa'i (11019) narrated it by way of Abu Salamah; and al-Bukhari (3244) and (4779), Muslim (2824), al-Tirmidhi (3197), and Ibn Hibban (369) by way of al-A'raj; both of them narrate from Abu Hurayrah.
Important point: Al-A'raj made clear in al-Bukhari's narration that the one who recited the verse at the end of the hadith was "Abu Hurayrah", not the Prophet (peace and blessings be upon him).