Hadithcore
Mishkat al-Masabih, 864

Al-Farafisa b. 'Umair al-Hanafi said that he learned <i>Sura Yusuf</i> (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.

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

References1 variant
In-Book Reference
Book 4, Hadith 288