"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.  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ مَنْ رَابَطَ يَوْمًا وَلَيْلَةً فِي سَبِيلِ اللَّهِ كَانَ لَهُ كَأَجْرِ صِيَامِ شَهْرٍ وَقِيَامِهِ وَمَنْ مَاتَ مُرَابِطًا أُجْرِيَ لَهُ مِثْلُ ذَلِكَ مِنَ الأَجْرِ وَأُجْرِيَ عَلَيْهِ الرِّزْقُ وَأَمِنَ مِنَ الْفَتَّانِ  

"I heard the Messenger of Allah ﷺ say: 'Whoever guards Ribat (the frontier) in the cause of Allah for one day and one night, he will have (a reward) like that of fasting and praying Qiyam for a month. If he dies he will continue to receive reward for what he did, and he will be kept safe from Al-Fattan, and he will be given provision.'"  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ مَنْ رَابَطَ فِي سَبِيلِ اللَّهِ يَوْمًا وَلَيْلَةً كَانَتْ لَهُ كَصِيَامِ شَهْرٍ وَقِيَامِهِ فَإِنْ مَاتَ جَرَى عَلَيْهِ عَمَلُهُ الَّذِي كَانَ يَعْمَلُ وَأَمِنَ الْفَتَّانَ وَأُجْرِيَ عَلَيْهِ رِزْقُهُ  

"Abu Salih, the freed slave of 'Uthman, said: 'I heard 'Uthman bin 'Affan say: I heard the Messenger of Allah ﷺ say: Ribat (guarding the frontier) for one day in the cause of Allah is better in rank than a thousand days spent within the residence.'"  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ رِبَاطُ يَوْمٍ فِي سَبِيلِ اللَّهِ خَيْرٌ مِنْ أَلْفِ يَوْمٍ فِيمَا سِوَاهُ مِنَ الْمَنَازِلِ  

"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.'"  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ يَوْمٌ فِي سَبِيلِ اللَّهِ خَيْرٌ مِنْ أَلْفِ يَوْمٍ فِيمَا سِوَاهُ