Yahya related to me from Malik from Abu Nuaym Wahb ibn Kaysanthat he heard Jabir ibn Abdullah say, "Someone who prays a rakawithout reciting the umm al-Qur'an in it has not done the prayerexcept behind an imam." (IT)
App reference (IT): Book 3, Hadith 40 (IT)
USC-MSA web (English) reference: Book 3, Hadith 40 (IT)
Arabic reference (IT): Book 3, Hadith 187 (IT)