Reciting the Ta'awwadh (the saying of "audhoo Billaahe minash-shaytaanir-rajeem") and the Basmalah (the saying of Bismillaahir-Rahmaanir-Raheem') before the Adhaan
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Question: What is the ruling regarding the recital of 'audhoo Billahe-minash-shaytaanir rajeem' and 'Bismillaahir-Rahmaanir-Raheem' before the adhaan?

Response: We do not know of anything which indicates the legality of the Ta'awwadh and Basmalah before the adhaan, either with respect to the mu.adhdhin nor the one who hears it. It is confirmed on the authority of the Prophet (sal-Allaahu `alayhe wa sallam) who said:

((Anyone who does an act which is not in agreement with us, then he will have it rejected)), [Muslim] and in another narration:

((Whoever introduces anything into this matter of ours (i.e. Islaam) that which is not from it, will have it rejected)), [Saheeh al-Bukhaaree/2697 and Saheeh Muslim/1718].

And with Allaah lies all success and may Allaah send prayers and salutations upon our Prophet (sal-Allaahu `alayhe wa sallam) and his family and his companions.

The Permanent Committee for Islaamic Research and Fataawa
Fataawa al-Lajnah ad-Daa.imah - Question No.4 of Fatwa No. 6321;
al-Bid'u wal-Muhdathaat wa maa laa asla lahu - Page 190