مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 864
Prayer
What is Recited During the Prayer - Section 3
وَعَن الفرافصة بن عُمَيْر الْحَنَفِيّ قَالَ: مَا أَخَذْتُ سُورَةَ يُوسُفَ إِلَّا مِنْ قِرَاءَةِ عُثْمَانَ بْنِ عَفَّانَ إِيَّاهَا فِي الصُّبْحِ وَمن كَثْرَة مَا كَانَ يُرَدِّدهَا. رَوَاهُ مَالك
Al-Farafisa b. 'Umair al-Hanafi said that he learned Sura Yusuf (Al-Qur’an; 12) simply from the recitation of it by ‘Uthman b. ‘Affan in the morning prayer, owing to the great number of times he repeated it. Malik transmitted it.
Mishkat al-Masabih, 864صَحِيح (الألباني)