English translation
2768. It was narrated that Ubayy bin Ka'b said: "The Messenger of Allāh ﷺ said: For guarding the frontier for a day in the cause of Allāh, defending the Muslims, seeking reward, apart from in the month of Ramadān, there is a reward granted greater than worshipping for a hundred years, fasting and praying. Guarding the frontier for a day in the cause of Allāh, defending the Muslims, seeking reward, in the month of Ramadān, is better before Allāh and brings a greater reward" — I think he said — "than worshipping for a thousand years, fasting and praying. If Allāh returns him to his family safe and sound, no bad deed will be recorded for him for a thousand years, but his good deeds will be recorded, and the reward for guarding the frontier will come to him until the Day of Resurrection." (Maudu')