Do you want a house in the paradise?.

   Our prophet (PBUH) says: if anyone prays in a day and a night twelve rakhahs voluntarily (supererogatory prayers), a house will be built for him in the paradise on account of these rakhahs. And when Abdullah Ibn Shaqiq asked A'yesha radia Allahu anha about the voluntary prayers offered by the Messenger of Allah (PBUH), she replied: before the noon prayer (Aldhuhr) He would pray four rakhahs in my house, then He go out and lead the people in the prayer, then return to my house and pray the two rakhahs, and He would lead the people in the sunset prayer (the Maghreb), then return to my house and pray two rakhahs, then He would lead the people in the night prayer (the Ishaa), and enter my house and pray two rakhahs, He would pray nine rakhahs during the night, including witr prayer (only one separated rakhahs), at night He would pray for a long time standing and for a long time sitting, when He recited the Quran while standing, He would bow and prostrate Himself from the standing position, and when He recited while sitting, He would bow and prostrate Himself from the sitting position, and when Dawn prayer (the Fajr) came He prayed two rakhahs, then He would come out and lead the people in the dawn prayer.

    Here this Hadith includes two types of the Sunnah prayers (voluntary), the first is related to the obligatory prayers, and the other is the night prayer. The twelve rakhahs you would perform it for the house in the paradise are related to the obligatory prayers, and they are:

1- two rakhahs before the Fajr prayer (Dawn), and our prophet said: don't omit them even if you are driven by the horses, and A'yesha said that the prophet (PBUH) was more particular about observing the two rakhahs before the dawn prayer than about observing any of the supererogatory prayers,  And he used to recite in the first rakhahs after Alfatihah Surat Alkafiruon (say o unbelievers) and in the second one Surat Alekhlas (say, He is Allah, the one).

2- four rakhahs before the dhuhr prayer (noon), and about them our prophet said is anyone keeps on praying regularly four rakhahs before and after the noon prayer he will not enter hell-fire.

3- two rakhahs after the dhuhr prayer + two rakhahs after the Maghreb prayer (sunset) + two rakhahs after the Ishaa prayer ( night ) .

Alli Ibn Abi Talib said that the prophet Muhammad (PBUH) would offer two rakhahs after every obligatory prayer except the Fajr and the Asr (afternoon) prayers, and the Sunnah in the two rakhahs after the Maghreb prayer is to recite Surat Alkafiruon in the first rakhah, and Surat Alekhlas in the second rakhah as the Sunnah of the Fajr ( dawn ) prayer.