‘Abdallah b. ‘Amr told of a man who said, “Messenger of God, the mu'adhdhins excel us.”* To him God’s Messenger replied, ‘Say the same words as they say, and when you come to the end, if you make any petition it will be granted to you.”
* This most probably means that they get a greater reward. The reply suggests how that may be counterbalanced.
Abu Dawud transmitted it.