(39) باب فَضْلِ الرِّبَاطِ .
It was narrated from Salman Al-Khair that the Messenger of Allah (ﷺ) said:
"Whoever guards Ribat (the frontier) for one day and one night, will be given a reward like that for fasting and praying Qiyam for a month, and whoever dies at Ribat (guarding the frontier) will be rewarded, and he will be given provision, and he will be kept safe from Al-Fattan." [1][1] According to As-Sindi, the preferred pronunciation is Al-Fattan, plural of Fatan refering to Al-Munkar and An-Nakir, while Al-Fattan would refer to Ash-Shaitan or the like, among the punishment of the grave, or, the angels of chastisement.
Reference: Sunan an-Nasa'i 3167
In-book reference: Book 25, Hadith 83
English translation: Vol. 1, Book 25, Hadith 3169