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." (TR)
App reference (TR): Book 3, Hadith 40 (TR)
USC-MSA web (English) reference: Book 3, Hadith 40 (TR)
Arabic reference (TR): Book 3, Hadith 187 (TR)