Hadith.881 - The Messenger, and his family, said:
"Whoever calls the adhan (call to prayer) in one of the cities of the Muslims for a year, Paradise becomes obligatory for him."
Man Lā Yaḥḍuruh al-Faqīh #882Hadith.883 - Imam (as) said:
"Whoever calls the adhan (call to prayer) for seven years with the intention of seeking Allah’s (swt) reward...