Sahih Bukhari Volume 5, Book 57, Hadith Number 86.

Narated By Ibrahim : ‘Alqama went to Sham and when he entered the mosque, he said, “O Allah! Bless me with a pious companion.” So he sat with Abu Ad-Darda. Abu Ad-Darda’ asked him, “Where are you from?” ‘Alqama replied, “From the people of Kufa.” Abu Ad-Darda said, “Isn’t there amongst you the keeper of the secret which nobody else knows, i.e., Hudhaifa?” Alqama said, “Yes.” Then Abu Ad-Darda further said, “Isn’t there amongst you the person whom Allah gave refuge from Satan through the invocation of His Prophet, namely Ammar?” Alqama replied in the affirmative. Abu Ad-Darda said, “Isn’t there amongst you the person who carries the Siwak (or the Secret) (i.e. of the Prophet, namely Abdullah bin Masud)?” Alqama said, “Yes.” Then Abu Ad-Darda asked, “How (Abdullah bin Masud) used to recite the Sura starting with: ‘By the night as it envelops; By the day as it appears in brightness?’ ” (92.1-2). Alqama said “And by male and female.” Abu Ad-Darda then said, “These people (of Sham) tried hard to make me accept something other than what I had heard from the Prophet.”