The Messenger of Allah said: "Whoever calls the Adhan for twelve years, he will be guaranteed Paradise, and for each day sixty Hasanat (good deeds) will be recorded for him by virtue of his Adhan, and thirty Hasanat by virtue of his Iqamah." (Using translation from Ibn Mājah 728)
أَنَّ النَّبِيَّ ﷺ قَالَ «مَنْ أَذَّنَ اثْنَتَيْ عَشْرَةَ سَنَةً وَجَبَتْ لَهُ الْجَنَّةُ وَكُتِبَ لَهُ بِتَأْذِينِهِ فِي كُلِّ مَرَّةٍ سِتُّونَ حَسَنَةً وَبِإِقَامَتِهِ ثَلَاثُونَ حَسَنَةً»