Ruling on saying Taslim after the Imam's first Taslim

A: It was related in the Sunan (Hadith compilations classified by jurisprudential themes) that the Prophet (peace be upon him) said: “The key to Salah (Prayer) is purification. Its Tahrim (forbiddance of any actions outside prayer) is (starts) with the Takbir (saying: ‘Allahu Akbar [Allah is the Greatest]’ upon commencing Prayer) and its Tahallul (ending of the praying state) is with the Taslim.” The authentically reported practice of the Prophet (peace be upon him) is that he used to offer two Taslims, one to his right and one to his left. This indicates that the two complete Taslims constitute one of the obligatory basic acts of Salah, and that the Imam is not considered to have completed the Salah until they have performed the second Taslim.Accordingly, the Taslim offered by the Ma’mum after the Imam’s first Taslim is performed before the Salah is complete. Therefore, it is not permissible for the Ma’mum to offer Taslim before the Imam completes the second Taslim, because the Prophet (peace be upon him) said: “I am your Imam, so do not precede me in Ruku‘ (bowing), Sujud (prostration), standing, or leaving (i.e. Ending Salah).” So, it is not permissible for a Ma’mum to do this.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.