Then the Prophet said, "Five are martyrs: One who dies of plague, one who dies of an Abdominal disease, one who dies of drowning, one who is buried alive (and) dies and one who is killed in Allah's cause." The Prophet further said, "If the people knew the reward for pronouncing the Adhan and for standing in the first row (in the congregational prayer) and found no other way to get it except by drawing lots they would do so."
Hadith Referenceصحيح البخاري / كتاب الأذان / 653
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة
Explanation & Benefits
Shaykh Abdul Sattar al-Hammad
Hadith Commentary: The explanation of the first part of this hadith will be provided under Kitab al-Jihad, Hadith: 2829, while the explanation of the latter part has already been given previously under Hadith: 615.
Source: Hidayat al-Qari: Commentary on Sahih Bukhari, Urdu, Page: 653