وَلِلْبُخَارِيِّ: «ثُمَّ هَاجَرَ، فَفُرِضَتْ أَرْبَعًا، وَأُقِرَّتْ صَلَاةُ اَلسَّفَرِ عَلَى اَلْأَوَّلِ»
‘Then emigrated and it was prescribed as four, but prayer while travelling was left according to the original prescription (of two Rakat).’
Bulugh al-Maram 512, Book 2, The Book of Prayer, Hadith 333. 1 min read