Ribat means standing in guard of the borderlines, at the places feared to be attacked by the enemies of Islam, and a Murabit is the person garrisoned there, who has dedicated himself to Jihad (striving/fighting) in the Cause of Allah and defending His Din (Religion) and his Muslim brothers. There are many Hadith that have been mentioned on the merits of staying in guardian and defense of the Muslim frontiers in the Cause of Allah for you Muslim brothers who are yearning to stand guarding the frontiers in the Cause of Allah. Some of them are quoted in: "AlTarghib wa AlTarhib" by AlHafiz AlMundhiry (may Allah be merciful to him).
It is narrated on the authority of Sahl ibn Sa' d (may Allah be pleased with them) that the Messenger of Allah (peace be upon him) said, "Ribat (guarding the Muslim frontiers) in the Cause of Allah for one day is better than this world and whatever is on it; and the place occupied by the whip of one of you in Paradise is better than this world and whatever is on it; and a morning or an evening's journey that a Servant travels in the Cause of Allah is better than this world and whatever is on it." (Related by AlBukhari, Muslim, AlTirmidhy, and others)
It is also narrated on the authority of Salman (may Allah be pleased with him) that he heard the Messenger of Allah (peace be upon him) saying, "Ribat (guarding the Muslim frontiers) for one day and night is better than Sawm (Fasting) for one month and standing its nights in prayer. Anyone who dies doing it will continue to receive the reward for that deed he used to do and will continue to have his Rizq (sustenance) and will be safe from Fitan (trials of death and within the grave)." (Related by Muslim this is his wording and AlTirmidhy, AlNasa'y, and AlTabarany who adds: "...and he shall be resurrected on the Day of Judgment as a martyr."
Similarly, it is reported on the authority of Fadalah ibn 'Ubayd (may Allah be pleased with him) that the Messenger of Allah (peace be upon him) said, "The deeds of every deceased person are sealed by their death, except for the one who dies as a Murabit (person guarding the Muslim frontiers) in the Cause of Allah; his deeds will continue to be grown (increased) for him until the Day of Resurrection and he will be safe from the Fitnah (trial) of the grave." (Related by Abu Dawud and AlTirmidhy, who said it is a Hasan Sahih Hadith [good authentic Hadith] and AlHakim who said, "It is a Sahih (authentic) according to the conditions of Muslim." Ibn Hiban in his "Sahih [Book of Authentic Hadith]"added at the end that he heard the Messenger of Allah (peace be upon him) saying, "The Mujahid (striver/fighter in the Cause of Allah) is the one who struggles against themselves for the Sake of Allah (may He be Glorified and Exalted)." This addition is reported in some of the copies of "Jami' Al Tirmidhy")
We ask Allah to guide the Muslims to have good understanding of His Din, gather them on the Guidance, unite their rows and their words on the Truth, make them adhere to His Book and the Sunnah of His Prophet (peace be upon him), to be governed and judged by the Shari' ah and gather on it, and cooperate through it. He is AllBountiful and Most Generous. May peace and blessings be upon our Prophet Muhammad, his family, and Companions!