The Messenger of Allah ﷺ said, "Whoever calls the adhan for twelve years, paradise becomes guaranteed for him, and for his calling the adhan each day sixty good deeds are recorded for him, and for every iqamah thirty good deeds."
حدثنا محمد بن يحيى والحسن بن علي الخلال قالا حدثنا عبد الله بن صالح حدثنا يحيى بن أيوب عن ابن جريج عن نافع
أن رسول الله ﷺ قال من أذن ثنتي عشرة سنة وجبت له الجنة وكتب له بتأذينه في كل يوم ستون حسنة ولكل إقامة ثلاثون حسنة
[Its chain is daif] It was recorded by Ibn Adi and others, and Hakim graded it sahih, 1/205, as did Dhahabi. Ibn Jurayj was a mudallis and narrated it using an ambiguous form of transmission, and it has another defect besides. It has a daif corroborating narration in Hakim.