Sahih Bukhari
901
Narrated Muhammad bin Seereen: On a rainy day Ibn `Abbas said to his Mu'adh-dhin, After saying, 'Ash-hadu anna Muhammadan Rasulullah' (I testify that Muhammad is Allah's Apostle), do not say 'Haiya 'Alas-Salat' (come for the prayer) but say 'Pray..
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