الكافي- ط الاسلامية, volume 3, page 382

5. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad ibn ‘Uthaman from al-Halabiy who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘If you join the Imam for one Rak‘at, say Takbir (Allah is great beyond description). You must perform Ruku‘ (bowing down on one’s knees) before he raises his head (from Ruku‘). You have joined for one Rak‘at but if he raises his head before you are in Ruku‘, you have missed one Rak‘at.’”

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.

6. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ali ibn al-Nu‘man from ibn Muskan from Sulayman ibn Khalid who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘If a man finds the Imam in Ruku‘ (bowing down on one’s knees), says Takbir (Allah is great beyond description) while his back is straight and performs Ruku‘ before the Imam raises his head, has joined for one Rak‘at.’”

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.

7. Muhammad ibn ’Isma‘il has narrated from al-Fadl ibn Shadhan from Ibn Abi ‘Umayr from Mu‘awiyah ibn ‘Ammar who has said the following: “I once asked abu ‘Abd Allah (a.s.), about a man who comes to Masjid when they are in Salah (prayer) and the Imam is one Rak‘at ahead or more. The Imam faces a problem and holds his hand when he is the closest to him and makes him to lead. He (the Imam) said, ‘He completes Salah (prayer) of the people, then sits down until they complete Tashahhud (testimonies of belief), he makes a gesture to his right and lifts and it (gesture) is considered saying Salam (the phrase of offering greeting of peace) and completion of their Salah (prayer) and he completes whatever he is yet to complete.’”

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.

8. It is a narration from him (narrator of previous Hadith) by al-Fadl and Ali ibn Ibrahim has narrated from his father all from Hammad ibn ‘Isa from Hariz from Zurarah who has said the following: “I once asked abu Ja‘far (a.s.), about a man who comes to a people during their Salah (prayer) and he is not intending it to be Salah (prayer). Their Imam faces invalidation of his Wudu’ and holds the hand of this man and makes him to lead. He performs Salah (prayer) with them. Is his Salah (prayer) sufficient to complete their Salah (prayer) while he has not intended it to be Salah (prayer)? He (the Imam) said, ‘It is not proper for a man to come to a people in their Salah (prayer) and not intend it to be Salah (prayer). It is proper for him to intend it to be Salah (prayer). If he has already performed Salah (prayer) he has another Salah (prayer). Otherwise, he must not come to them; their Salah (prayer) is sufficient for them even if he did not intend it to be Salah (prayer).”’

Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.