الكافي- ط الاسلامية, volume 3, page 380

5. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn ’Isma’il who has said the following: “I once wrote to abu al-Hassan, ‘Alayhi al-Salam, ‘I go to Masjid with my neighbors and others and they ask me to lead Salah (prayer) with them, when I have already performed Salah (prayer) before coming to them. Perhaps certain ones have followed me in Salah (prayer) that I have already performed and they are people of weak understanding and the ignorant ones. I dislike leading. I have performed in such condition that I have mentioned. Command me so I obey and follow your command by the will of Allah. He (the Imam) wrote to me, ‘You must lead them in Salah (prayer).”’

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

6. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad from al-Halabiy who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘Whoever performs Salah (prayer) with them in the first row it is as if he has performed Salah (prayer) with the Messenger of Allah.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

7. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ‘Uthman ibn ‘Isa from Sama‘ah who has said the following: “I once asked him (the Imam) (a.s.), about a man who performs Salah (prayer) and has completed only one Rak‘at of an obligatory Salah (prayer) that the Imam arrives. He (the Imam) said, ‘If he is an Imam who possesses the quality of justice, he performs one more Rak‘at, completes and makes it an optional Salah (prayer). He joins the Imam in his Salah (prayer) as is. If he (the Imam) does not have the quality of justice, he (the man) continues with his Salah (prayer) as is. He performs one more Rak‘at with him (the Imam) and sits down for a time within which one can say: I testify that only Allah deserves worship, He is one and has no partners and I testify that Muhammad is His servant and Messenger. He then completes his Salah (prayer) with him as possibly he can; Taqiyah (fear) provides great chances and there is nothing performed in Taqiyah for which one is not rewarded by the will of Allah.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

8. A group has narrated from has narrated from Ahmad ibn Muhammad from form al-Husayn ibn Sa‘id from al-Haytham ibn Waqid from al-Husayn ibn ’Abd Allah al-Arjaniy who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘If one performs Salah (prayer) in his house then comes to one of their Masjid and performs Salah (prayer) with them, he leaves with all of their good deeds.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.