Fiqh-us Sunnah
Fiqh-us-Sunnah Volume 002, Supererogatory Prayer, Fiqh 2.011.
Hadith Section/Book: Fiqh-us Sunnah Fiqh-us Sunnah Section 12. Nonstressed Sunnah Prayers (As-Sunnah Ghair Al-Mu'akkadah)
Section : Two rak'at before salatul 'isha.
'Abdullah Ibn Mughaffal reports that the Prophet said: "Between every azhan and iqamah there is a prayer. Between every azhan and iqamah there is a prayer." And, after saying it a third time, he said: "For whoever wishes [to pray it]." This is related by the group. Ibn Hibban records from Ibn az-Zubair that the Prophet said: "There exists no obligatory prayer without there being, immediately preceding it, two rak'at."
'Abdullah Ibn Mughaffal reports that the Prophet said: "Between every azhan and iqamah there is a prayer. Between every azhan and iqamah there is a prayer." And, after saying it a third time, he said: "For whoever wishes [to pray it]." This is related by the group. Ibn Hibban records from Ibn az-Zubair that the Prophet said: "There exists no obligatory prayer without there being, immediately preceding it, two rak'at."