Hadith.869 - The Messenger of Allah (sw) said:
"The mu'adhdhin (caller to prayer) has a reward between the adhan and the iqamah equal to that of a martyr who is drenched in his blood in the way of Allah (swt), the Mighty and Majestic."
Imam Ali (as) said: "People will compete over the adhan."
The Prophet replied: "No, there will come a time when people will leave the adhan to their weak ones. These (mu'adhdhins) are people whose flesh Allah (swt) has forbidden for the Fire”.