We offer the three obligatory Rak`ahs of Maghrib (sunset) Prayer and then six supererogatory Rak`ahs. Is this practice right or wrong?
It is an act of Sunnah to offer two Rak`ahs after the Maghrib Prayer. It was authentically reported from the Prophet (peace be upon him) on the authority of
Um Habibah (may Allah be pleased with her) who said, I heard the Prophet (peace be upon him) saying
If any Muslim servant (of Allah) offers for the sake of Allah twelve supererogatory Rak`ahs each day other than the obligatory ones, Allah will build for him a house in Paradise. They are: four Rak`ahs before Zhuhr and two after it, two Rak`ahs after Maghrib, two Rak`ahs after `Isha' and two Rak`ahs before Fajr.
With regard to (Part No. 6; Page No. 122) adhering to offering six Rak`ahs after the Maghrib Prayer, it is not an act of Sunnah.