(39) باب فَضْلِ الرِّبَاطِ .
It was narrated that Abu Salih, the freed slace of 'Uthman, said:
"uthman bin 'Affan said: 'I heard the Messenger of Allah (ﷺ) say: A day in the cause of Allah is better than a thousand days doing anything else.'" (RU)
Reference (RU): Sunan an-Nasa'i 3170 (RU)
In-book reference (RU): Book 25, Hadith 86 (RU)
English translation (RU): Vol. 1, Book 25, Hadith 3172 (RU)