One who dies guarding the frontier in the path of Allah, his deeds continue to grow until the Day of Resurrection

It is narrated from Sayyiduna Fadalah bin Ubayd (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever dies in any state (of righteous deeds) will be raised in that same state on the Day of Resurrection, whether it be guarding the frontier, Hajj, or any other deed."

It is narrated from Sayyiduna Fadalah bin Ubayd (may Allah be pleased with him): I heard the Messenger of Allah (peace and blessings be upon him) say: "The deeds of every deceased person are sealed at his death, except for the one who dies while guarding the frontiers (ribat) in the path of Allah; his deeds continue to grow until the Day of Resurrection, and he is kept safe from the trial (fitnah) of the grave."
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.

It is narrated from Sayyiduna Abu Dharr (may Allah be pleased with him); he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "There is no Arabian horse that is not permitted, at every dawn, to make two supplications. It says: 'Allahumma innaka khawwaltani man khawwaltani min bani Adam, faj'alni ahabba ahlihi wa malihi ilayhi' (O Allah, You have placed me in the possession of whomever You have from the children of Adam, so make me more beloved to him than his family and his wealth)."
This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to call a mare (a female horse) "faras" as well.
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.