(13) باب مَا جَاءَ فِي الْوَقْتِ الأَوَّلِ مِنَ الْفَضْلِ
Umm Farwah - and she was one of those who gave pledge of allegiance to the Prophet - narrated:
"The Prophet was asked: 'Which deed is the best?' So he said: 'Salat in the beginning of its time.'" (ES)
Reference (ES): Jami` at-Tirmidhi 170 (ES)
In-book reference (ES): Book 2, Hadith 22 (ES)
English translation (ES): Vol. 1, Book 2, Hadith 170 (ES)