The Manners of Reciting Quran'
Al-Barqi states in Al-Mahasin Book:Ismaeel bin Aban Al-Hannat reported from Imam Abou Abdellah (Pbuh) that he said: "The Messenger of Allah (Pbuhp) said: "Clean the road of Quran." One said: "O Messenger of Allah, what is the road of Quran?" He(Pbuhp) said: "Your mouths." One said: "With what?" He (Pbuhp): "With the Siwak.""
Ibn Babawaih states in Al-Khisal Book:Abou Baseer and Mohammad bin Muslim reported form Imam Abou Abdellah (Pbuh) that he said: "My father said to me reporting from my grandfather from his forefathers from Ali (Pbut) that he said: "No servant can recite Quran if he was not pure until he purifies himself.""
Abdellah bin Jaa'far Al-Humeiry states in Qurb Al-Isnad Book: Mohammad bin Al-Fadeel reported that he said to Imam Abou Al-Hassan (Pbuh): "Sometimes while I'm reciting Quran, I stop and go to the bathroom. Then I wash and continue reciting Quran." The Imam (Pbuh) said: "Do not, until you do the Wodou' of Prayer (Islamic Ablution)."
Al-Sayyid Ibn Tawous states in Iqbal Al-A'amal Book: Ali bin Maimoun Al-Sani' Abi Al-Akrad said that Imam Abou Abdellah (Pbuh) used to say when he grabs Quran with his right before opening it and reciting it:
"In the name of Allah, O Allah I admit that this is Your book that descended from you to Your Messenger Mohammad Bin Abdellah (Pbuhp), Your book that speaks through the voice of Your Messenger; Your statements are in it and the laws of Your religion. You bestowed it upon Your Prophet and made it the covenant that You took from Your creatures and the stretched rope between You and Your servants. O Allah, I opened Your book and covenant. O Allah, allow my sight to it to be worship, my reading to be contemplation and my thoughts to be lessons.
O Allah, allow me to learns from Your lessons that are in it and to avoid disobeying You. Don’t seal my hearing and heart when reciting Your book, don’t put a veil on my sight, don’t allow my reciting to be with no understanding yet allow me to understand and learn lessons from its verses and statements and to follow the laws of your religion. Don’t allow me to recite and look in negligence. You are the Most Graceful Most Merciful."
Al-Moufeed also stated it in Al-Ikhtisas Book.