Ibn ‘Abbas said the Prophet made a journey during which he had a stop of nineteen days, and he prayed two rak'as at each time of prayer. Ibn ‘Abbas said, “So when we are stopping nineteen days between here and Mecca we pray two rak'as each time, but when we stop more than that we pray four.” Bukhari transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب الصلاة / 1337
Hadith Gradingالألبانی:صَحِيح | زبیر علی زئی:صحيح
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «رواه البخاري (1080)»