Narrated Ibrahim:
The companions of `Abdullah (bin Mas`ud) came to Abu Darda', (and before they arrived at his home), he looked for them and found them. Then he asked them,: 'Who among you can recite (Qur'an) as `Abdullah recites it?" They replied, "All of us." He asked, "Who among you knows it by heart?" They pointed at 'Alqama. Then he asked Alqama. "How did you hear `Abdullah bin Mas`ud reciting Surat Al-Lail (The Night)?" Alqama recited: 'By the male and the female.' Abu Ad-Darda said, "I testify that I heard me Prophet reciting it likewise, but these people want me to recite it:-- 'And by Him Who created male and female.' but by Allah, I will not follow them."
USC-MSA web (English) reference: Vol. 6, Book 60, Hadith 468
Arabic reference: Book 65, Hadith 4944