It is narrated from Khaythamah bin Abi Sabrah al-Ju'fi that he said: I came to Madinah and asked Allah to grant me a righteous companion to sit with, and Allah made Sayyiduna Abu Hurayrah (may Allah be pleased with him) available to me. I sat with him and said: I asked Allah for a righteous companion, and He brought me to you. He asked me: Where are you from? I said: From the land of Kufah; I have come seeking knowledge and goodness. He said: "Are there not among you Sayyiduna Sa'd bin Malik (Sa'd bin Abi Waqqas), whose supplication is answered; and Abdullah bin Mas'ud, who looked after the ablution water and the sandals of the Messenger of Allah (peace and blessings be upon him); and Hudhayfah bin al-Yaman, the keeper of the secrets of the Messenger of Allah (peace and blessings be upon him); and Ammar bin Yasir, to whom Allah granted protection from Satan upon the tongue of His Prophet (peace and blessings be upon him); and Salman (al-Farisi), the scholar of the two Books?" Qatadah said: The two Books mean the Injil (Gospel) and the Qur'an (al-Furqan). The chain of this hadith is sahih (authentic), but the two Shaykhs did not record it.