What would be read when reciting some Surah
Ibn Babawaih states in Oyun Al-Akhbar Book: Ibn Abi Al-Dahhak reported: When Imam Rida (Pbuh) read Al-Tawheed he used to read {He is Allah the One} in a very low voice
and when he finished, he used to say "Indeed this is how our Lord is."
When he read Al-Kafiroun Chapter, he used to recite {Say: "O you nonbelievers"} in a very low voice and when he finished he used to say "Allah in my lord and Islam is my religion."
When he read Al-Teen Chapter he used to say afterwards "Indeed, I admit and witness that"
When he read Al-Qiyama chapter he used to say afterwards "Exalted You Allah, Indeed"
When he read Al-Fatima chapter he used to say afterwards "Thanks for Allah lord of all realms."
When he read Al-A'ala chapter he used to say "Exalted is my Lord the Highest" in a very low voice.
When he read Al-Ma'ida chapter he used to say "At your beck and call O Allah. At your beck and call" in a very low voice.
In Al-Khisal Book:Imam Ali (Pbuh) said: " When you recite the last chapters that contain exaltation, say "Exalted is Allah the highest." When you recite "Indeed Allah and his angels are praying upon the prophet" send your prayers upon him either you were praying or not. When you recite Al-Teen Chapter, say afterwards "We also witness this." When you recite {Say: "We believed in Allah." Say: "We believed in Allah" and continue till the end of the verse."
In Al-Khisal Book: Ali bin Shajara reported from Imam Abou Abdellah (Pbuh) that he said: "When you recite Al-Masad Chapter, damn Abi Lahab because he was from the deniers who denied the Messenger of Allah (Pbuhp) and what he brought forth from Allah."
Al-Humeiry states in Qurb Al-Isnad Book: Al-Azdi reported that Imam used to say after {Say: "O You infidels."} "O you infidels."; after {I worship not what you worship} "I worship my lord"; after {I have my religion} "My religion is Islam. I live as a Muslim and die as a Muslim Inshalla."
Mohammad bin Al-Hassan states in Al-Tah'dheeb Book: Abdel-Rahman bin Al-Hajjaj reported from Imam Abou Abdellah (Pbuh) that he said: "Imam Abou Jaa'far (Pbuh) used to say when he finishes reciting Al-Ikhlas chapter: "Indeed, this is how is Allah My Lord.""
Mohammad bin Al-Hassan states in Al-Tah'dheeb Book: Ammar bin Moussa reported from Imam Abou Abdellah (Pbuh) that he said: "When a man recites Al-Shams Chapter he should say afterwards: "Allah is honest and so is His Messenger." When a man recites {(Who) is better?- Allah or the false gods they associate (with Him)?} he should say: "Allah is better. Allah is better. Allah is greater." When a man recites { Yet those who reject Faith hold (others) as equal, with their Guardian-Lord} he should say "Those who held others as equal to Allah are indeed liars." When a man recites { Say: "Thanks be to Allah, who begets no son, and has no partner in (His) dominion: Nor (needs) He any to protect Him from humiliation: yea, magnify Him for His greatness and glory!"} he should say: "Allah is the Greatest, Allah is the Greatest, Allah is the Greatest."" Ammar asked: "What if he didn’t say these words?" The Imam (Pbuh): "It doesn’t count as a sin."
Mohammad bin Al-Hassan states in Al-Tah'dheeb Book: Hammad bin Othman reported from Imam Abou Abdellah (Pbuh) that he said: " It is preferred if you recite Al-Rahman chapter after the dawn prayer on Friday. Each time you recite {Which of your Lords bounties you (two) deny} you should say: "I don’t deny any of my Lord's signs.""
Al-Fadel bin Al-Hassan Al-Tabrasi states in Majma' Al-Bayan Book: Al-Fadeel bin Yasar said: "Imam Abou Jaa'far (Pbuh) ordered me to recite Al-Ikhlas Chapter and when I finish it to say: "Indeed this is how my Lord is" three times."
Al-Fadel bin Al-Hassan Al-Tabrasi states in Majma' Al-Bayan Book: Dawood bin Al-Haseen reported form Imam Abou Abdellah (Pbuh) that he said: "When you say {Say: "O you infidels."} say: "O you infidels." When you say {I worship not what you worship} say: "I worship Only Allah." When you say: {You have your religion and I have my religion.} say: "My lord is Islam and my religion is Allah.""
Al-Fadel bin Al-Hassan Al-Tabrasi states in Majma' Al-Bayan Book: Al-Barra' bin Azib: "When this verse {Isn't such able to revive the dead} descended, the Messenger of Allah (Pbuhp) said: "Exalted you are Allah. Indeed"" as narrated by Imam Abou Jaa'far (Pbuh) and Imam Abou Abdellah (Pbuh).
Al-Sayari states in Al-Tanzaal Wal-Tahreef Book: Moawia bin Ammar reported from Imam Abou Abdellah (Pbuh) that he said: "When you recite Al-Ikhlas chapter, say afterwards: "I admit, this is how Allah our Lord is." He said: "If it was written or recited by heart?" He (Pbuh) said: "Yes."
Al-Sayari states in Al-Tanzaal Wal-Tahreef Book: Hareez reported that when Imam Abou Jaa'far (Pbuh) used to recite Al-Kafiroun chapter, after saying {You have your religion and I have my religion, he used to say: "My religion is Islam." Trice.
Al-Sayari states in Al-Tanzaal Wal-Tahreef Book: Amir bin Ja'dha'a reported from Imam Abou Abdellah (Pbuh) that he said: "When you recite: {Say: "O you infidels # I worship not what you worship} you should say: "I worship only Allah." When you finish the chapter you should say: "My religion is Islam. This is how I die being a Muslim and I will be resurrected being a Muslim Inshalla."