Jami` at-Tirmidhi 1663

Narrated Al-Miqdam bin Ma'diykarib: 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