Whoever says below when he hears the Mu'adh-dhin

✦ Whoever says below when he hears the Mu'adh-dhin (means After Adhan) Allah will pardon his sins for him

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✦ Sa'd bin Abi Waqqas Radi Allahu Anhu narrated that :Allah's Messenger Sallallahu Alaihi wasallam said: "Whoever says, when he hears the Mu'adh-dhin (means After Adhan) : (Wa Ana Ashadu An La Ilaha Illallah, Wahdahu La Sharika Lahu, Wa Anna Muhammadan Abduhu Wa Rasuluhu, Radittu Billahi Rabban Wa Bil-Islami Dinan, Wa Bi Muhammadin Rasulan) 'I too testify that none has the right to be worshiped but Allah, Alone without partners, and that Muhammad is His slave and Messenger, I am pleased with Allah as my Lord, with Islam as my religion and Muhammad as a Messenger.' Allah will pardon his sins for him."

Jamia Tirmizi, Book 2, 210-Sahih