Sunan Ibn Majah
721
It was narrated from Sa'd bin Abu Waqqas that:
The Messenger of Allah said: Whoever says, when he hears the Mu'adh-dhin, 'Wa ana Ash-hadu an la ilaha illallah wahdahu la sharika lahu, wa ash-hadu anna Muhammadan 'abduhu wa rasuluhu, radaytu..
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