That the Messenger of Allah (ﷺ) said: "There are six things with Allah for the martyr. He is forgiven with the first flow of blood (he suffers), he is shown his place in Paradise, he is protected from punishment in the grave, secured from the greatest terror, the crown of dignity is placed upon his head - and its gems are better than the world and what is in it - he is married to seventy two wives along Al-Huril-'Ayn of Paradise, and he may intercede for seventy of his close relatives." [Abu 'Eisa said:] This Hadith is Hasan Sahih.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عَبْدِ الرَّحْمَنِ، حَدَّثَنَا نُعَيْمُ بْنُ حَمَّادٍ، حَدَّثَنَا بَقِيَّةُ بْنُ الْوَلِيدِ، عَنْ بَحِيرِ بْنِ سَعْدٍ، عَنْ خَالِدِ بْنِ مَعْدَانَ، عَنِ الْمِقْدَامِ بْنِ مَعْدِيكَرِبَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم لِلشَّهِيدِ عِنْدَ اللَّهِ سِتُّ خِصَالٍ يُغْفَرُ لَهُ فِي أَوَّلِ دَفْعَةٍ وَيَرَى مَقْعَدَهُ مِنَ الْجَنَّةِ وَيُجَارُ مِنْ عَذَابِ الْقَبْرِ وَيَأْمَنُ مِنَ الْفَزَعِ الأَكْبَرِ وَيُوضَعُ عَلَى رَأْسِهِ تَاجُ الْوَقَارِ الْيَاقُوتَةُ مِنْهَا خَيْرٌ مِنَ الدُّنْيَا وَمَا فِيهَا وَيُزَوَّجُ اثْنَتَيْنِ وَسَبْعِينَ زَوْجَةً مِنَ الْحُورِ الْعِينِ وَيُشَفَّعُ فِي سَبْعِينَ مِنْ أَقَارِبِهِ . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ صَحِيحٌ غَرِيبٌ .
Tirmizi
The Book on Virtues of Jihad • Hadith 1711