(40) باب مَا جَاءَ فِي كَمْ تُقْصَرُ الصَّلاَةُ
Ibn Abbas narrated:
"The Messenger of Allah traveled on a journey and he prayed two Rak'ah for nineteen days." Ibn Abbas said: "So when we would stay somewhere for nineteen (days) we would pray two Rak'ah , and if we stayed longer than that we would complete the Salat." (ES)
Reference (ES): Jami` at-Tirmidhi 549 (ES)
In-book reference (ES): Book 6, Hadith 6 (ES)
English translation (ES): Vol. 2, Book 1, Hadith 549 (ES)