Sayyiduna Imam Hasan (may Allah be pleased with him) narrates this statement from Sayyiduna Ali bin Abi Talib (may Allah be pleased with him): The Noble Prophet (peace and blessings be upon him) used to recite "Bismillah ir-Rahman ir-Rahim" in prayer.

Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) narrates: The Prophet Muhammad (peace and blessings be upon him) used to recite "Bismillah ir-Rahman ir-Raheem" aloud with both surahs.

Imam Abu Ja'far Sadiq (may Allah have mercy on him) narrates from his father Imam Baqir (may Allah have mercy on him), who narrates from his father Imam Zain al-Abidin (may Allah have mercy on him), who narrates from his father Imam Husayn (may Allah be pleased with him), the following statement of Sayyiduna Ali (may Allah be pleased with him): The Noble Prophet (peace and blessings be upon him) asked: "When you stand for prayer, how do you recite?" I replied: I recite 'Alhamdu lillahi Rabbil 'alamin.' The Noble Prophet (peace and blessings be upon him) said: "You should recite 'Bismillahir Rahmanir Rahim.'"

Sayyiduna Ali (may Allah be pleased with him) and Sayyiduna Ammar (may Allah be pleased with him) narrate: The Noble Prophet (peace and blessings be upon him) used to recite "Bismillah ir-Rahman ir-Rahim" aloud in the obligatory prayer.

Sayyiduna Ali (may Allah be pleased with him) and Sayyiduna Ammar (may Allah be pleased with him) both narrate: The Noble Prophet (peace and blessings be upon him) used to recite "Bismillah ir-Rahman ir-Rahim" aloud.

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Noble Prophet (peace and blessings be upon him) used to recite "Bismillah ir-Rahman ir-Rahim" aloud in prayer.

Ahmad bin Muhammad, may Allah have mercy on him, narrates from his father, who narrates from his grandfather: The Commander of the Faithful, Mahdi, led us in the Maghrib prayer. He recited "Bismillah ir-Rahman ir-Rahim" aloud. The narrator says: I asked, "O Commander of the Faithful! What is this method?" He replied: My father narrated from his father, from his grandfather, from Sayyiduna Abdullah bin Abbas, may Allah be pleased with them both, that the Noble Prophet, peace and blessings be upon him, used to recite "Bismillah ir-Rahman ir-Rahim" aloud. The narrator says: I asked, "Can we narrate this from you?" He replied: Yes.

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Noble Prophet (peace and blessings be upon him) used to recite "Bismillah ir-Rahman ir-Rahim" aloud at the beginning of the prayer.

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Noble Prophet (peace and blessings be upon him) continued to recite Bismillah ar-Rahman ar-Rahim aloud with both surahs until his apparent passing.

It is narrated about Sayyiduna Abdullah bin Umar (may Allah be pleased with them) that he used to recite "Bismillah ir-Rahman ir-Rahim" aloud, and he mentioned that the Noble Prophet (peace and blessings be upon him) also used to recite it aloud.