Abu Hurairah reported,

The martyrs are five, the one who dies of plague, the one who dies of a stomach ailment, the one who drowns, the one who is crushed beneath a collapsing building, and the one martyred in the cause of Allah.He also said, "If people knew the reward that lies in the call to prayer and in the first row, and then found no way to settle it except by drawing lots, they would draw lots for it."

Bukhari 653

Sahih

ثم قال الشهداء خمسة المطعون والمبطون والغريق وصاحب الهدم والشهيد في سبيل الله وقال لو يعلم الناس ما في النداء والصف الأول ثم لم يجدوا إلا أن يستهموا لاستهموا عليه

البخاري 653صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Adhan
Chapter
Virtue of going early to Dhuhr
Numbering
Darussalam 653
Bukhari 653