Musannaf Ibn Abi Shaybah

Hazrat Ibn Abbas (may Allah be pleased with them) narrates that the Prophet (peace and blessings be upon him) lifted the curtain during his illness of death and saw that the people were standing in rows behind Hazrat Abu Bakr. He said, "O people! Of the glad tidings of prophethood, only true dreams remain, which a Muslim will see or will be shown to him. Listen carefully! I have been forbidden from reciting the Qur'an in bowing (ruku) or prostration (sajda)."

Hazrat Ali (may Allah be pleased with him) said in Kufa that the Messenger of Allah (peace and blessings be upon him) forbade me from reciting (Qur'an) during bowing (ruku).

Hazrat Ali (may Allah be pleased with him) said: Do not recite (the Qur'an) while in the state of bowing (ruku) and prostration (sajdah).

Hazrat Ubaidullah bin Abi Ziyad says that I asked Hazrat Saeed bin Jubair: If I recite a verse of prostration while in the state of prostration, how should I perform the prostration of recitation? He replied: The prostration you are already in is sufficient for you, but why do you recite while in the state of prostration?

Hazrat Mujahid says that there is no recitation in bowing (ruku) and prostration (sajdah); these two pillars have been made for the remembrance of Allah.