All praise is due to Allah, and may peace and blessings be upon the Messenger of Allah.
The trial of the grave and the questioning by the two angels are established in many authentic hadiths. In principle, these apply generally, but some texts make exceptions for certain people, including a martyr who is killed in the cause of Allah.
It is reported from one of the Companions of the Prophet ﷺ that a man asked: “O Messenger of Allah, why are believers tested in their graves, except for the martyr?” The Prophet ﷺ replied:
“The flashing of swords above his head is sufficient as a trial.”
Reported by An-Nasa’i; Ibn al-Qattan graded it good, and Al-Albani authenticated it.
The meaning of this hadith is that the martyr has demonstrated the sincerity of his faith and his steadfastness when facing combat, so he does not need another test in his grave. A hypocrite would generally flee if confronted with swords, whereas the believer has sacrificed himself for the sake of Allah, the Exalted.
It is also reported from Al-Miqdam ibn Ma‘di Karib, may Allah be pleased with him, that the Prophet ﷺ said:
“The martyr has six blessings with Allah: he is forgiven with the first flow of his blood, he is shown his place in Paradise, he is protected from the punishment of the grave, he is safe from the Greatest Terror, a crown of dignity is placed upon his head, he is married to seventy-two wives from among the wide-eyed maidens of Paradise, and he is permitted to intercede for seventy of his relatives.”
Reported by At-Tirmidhi, Ibn Majah, and Ahmad. At-Tirmidhi said: “A good, authentic, and unusual hadith,” and Al-Albani authenticated it.
Accordingly, a number of scholars have concluded that a martyr killed in the cause of Allah is not subjected to the trial of the grave or its questioning, because his fighting and self-sacrifice for Allah provide clear evidence of the sincerity of his faith.
Some scholars have also mentioned that this ruling may extend to certain other people whom the texts exempt from the trial of the grave, such as those stationed in defense of the Muslim community in the cause of Allah. However, the details depend on the evidence reported concerning each category.
Therefore, the hadiths concerning the martyr’s protection from the trial of the grave are established. Among the strongest is the hadith: “The flashing of swords above his head is sufficient as a trial.” It indicates that a martyr who is killed in the cause of Allah is exempt from the trial and questioning of the grave.
And Allah knows best.