(1) باب كَيْفَ فُرِضَتِ الصَّلاَةُ فِي الإِسْرَاءِ
Narrated `Aisha:
the mother of believers: Allah enjoined the prayer when He enjoined it, it was two rak`at only (in every prayer) both when in residence or on journey. Then the prayers offered on journey remained the same, but (the rak`at of) the prayers for non-travelers were increased. (ES)
Reference (ES): Sahih al-Bukhari 350 (ES)
In-book reference (ES): Book 8, Hadith 2 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 8, Hadith 346 (ES)