It is narrated from Alqamah: I came to Syria and prayed two rak'ahs, then I supplicated: "O Allah, grant me a righteous companion." I met some people and sat with them. Suddenly a man came and sat beside me. I asked: Who is this? The people said: This is Sayyiduna Abu al-Darda (may Allah be pleased with him). I said to him: I had prayed to Allah to grant me a righteous companion, and He has granted me you. He asked: Where are you from? I said: From the people of Kufah. He said: "Is there not among you Ibn Umm Abd (Sayyiduna Ibn Mas'ud), who was the keeper of the sandals, the pillow and the ablution vessel of the Messenger of Allah (peace and blessings be upon him)? And is there not among you the man (Sayyiduna Ammar) whom Allah protected from Satan by the blessed tongue of His Prophet? And is there not among you the confidant of the Messenger of Allah (peace and blessings be upon him) (Sayyiduna Hudhayfah), whose secret no one knows besides him?" This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it. All the chains before it are also sahih, but the two Shaykhs did not record them; I did not comment on them because they were not musnad (connected to the Prophet), whereas this report is musnad.