While the Qur’an was collected after Mohammed’s death, Sahih Muslim (vol.2:2286 p.500,501) says that one sura was lost, and the Qur’an of Ibn Masu’d did not have three Suras, and ‘Ubai bin Ka’b’s Qur’an did not have many suras, we can know that most of the suras belonged there based on the quotes and paraphrases in the hadiths and early Muslim historians.
Wakati ambapo Kurani ilikusanywa baada ya kifo cha Muhammad, Sahih Muslim (juzuu ya 2:2286 uk.500, 501) inasema kuwa sura moja ilipotea, na Kurani ya Ibn Masu’d haikuwa na sura tatu, na Kurani ya ‘Ubai bin Ka’b haikuwa na sura nyingi, tunaweza kujua kuwa nyingi za sura zilizopo zilitokana na dondoo na ufafanuzi wa Hadithi na wanahistoria wa mwanzo wa Kiislam.