Question: What is the ruling of saying ‘Sam’i Allah Liman Hamidah’ when raising from the bowing position? What is the ruling of the invocations of the prostration? What is the ruling regarding repeating prayers?
Answer: In the Name of Allah, the Most Merciful and Compassionate
The prayer is only invalidated if an obligatory (fard) act is omitted, or an invalidating action is committed.
The saying of Sami’a ‘Llahu liman hamidah and Subhana Rabbiya ‘l-A’la are emphasized sunnas (sunna mu’akkada) of the Prophet (may Allah bless him and give him peace). If they are omitted, this does not invalidate the prayer. Therefore, repeating the prayer due to a mistake in saying any of these or omitting them, is incorrect.
The opening takbir (normally, saying ‘Allahu Akbar’) is necessary (wajib) and must be pronounced fully and audibly. As for the remaining takbirs, they are emphasized sunna and do not invalidate the prayer if omitted [Shurunbulali; Maraqi al-Falah].
It is incorrect to repeat the prayer unless one committed a prohibitively disliked action therein [Shurunbulali; Maraqi al-Falah].
The Messenger of Allah (may Allah bless him and give him peace) said, “Do not pray a prayer twice in one day!” [Ibn Hibban, Sahih Ibn Hibban]. This prohibition is understood to refer to the repeating of prayer due to misgivings (waswasa) [Ibn Abidin; Radd al-Muhtar].
Hope this helps
[Shaykh] Yusuf Weltch
Checked and Approved by Shaykh Faraz Rabbani
Shaykh Yusuf Weltch is a graduate from Tarim; a student of Habib Umar and other luminaries; and authorized teachers of Qur’an and the Islamic sciences.