Hadith 8

Sunan an-Nasa'i

Book 5: The Book of Salah Sahih

Chapter 3

How The Salah Was Made Obligatory

باب كَيْفَ فُرِضَتِ الصَّلاَةُ ‏.‏

Sahih
Sunan an-Nasa'i 455
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ صَالِحِ بْنِ كَيْسَانَ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، قَالَتْ فُرِضَتِ الصَّلاَةُ رَكْعَتَيْنِ رَكْعَتَيْنِ فَأُقِرَّتْ صَلاَةُ السَّفَرِ وَزِيدَ فِي صَلاَةِ الْحَضَرِ ‏.‏
It was narrated that 'Aishah said:

"The Salah was enjoined two Rak'ahs at a time, then the Salah when traveling remained like that, but the Salah while resident was increased."