´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.'"
Explanation & Benefits
Hafiz Muhammad Ameen
There is nothing surprising in this. Worship performed on Laylat al-Qadr is also superior to the worship of a thousand months’ nights.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 3172