An obligatory Salah suffices for Tahiyyat-ul-Masjid and the supererogatory Salah for Wudu'

Q 6: I am used to offer the supererogatory Salah of Wudu' (ablution) then Tahiyyat-ul-Masjid (two-unit Prayer to salute the mosque). One day I entered the Masjid (mosque) while the Imam was about to start Zhuhr (Noon) Prayer; should I have offered Salah with him in congregation then perform the supererogatory Salah later? What should my intention be in this case?

A: When you enter the Masjid and Salah has begun, you should offer Salah in congregation and you need not offer supererogatory Salah after the obligatory Salah, as the Prophet said: When the prayer commences, there is no prayer (valid) except the obligatory prayer. Offering the obligatory Salah suffices for Tahiyyat-ul-Masjid and the supererogatory Salah of Wudu'.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.