Sayyiduna Abu Mahdhurah says that once I submitted: O Messenger of Allah! Teach me the Adhan. The Prophet (peace be upon him) passed his blessed hand over my forehead and said: Say "Allahu Akbar" loudly twice, then say "Ashhadu an la ilaha illallah" twice, then say "Ashhadu anna Muhammadur Rasulullah" in a low voice twice, then say it loudly twice, then say "Hayya 'ala-s-Salah" and "Hayya 'ala-l-Falah" twice each, and when you give the morning Adhan, say "As-salatu khayrun minan-nawm" twice, and at the end say "Allahu Akbar, Allahu Akbar" and "La ilaha illallah."
Hadith Referenceمسند احمد / مسند المكيين / 15379
Hadith Gradingحکم دارالسلام:حديث صحيح بطرقه، وهذا إسناد ضعيف لجهالة محمد بن عبدالملك، و لجهالة حال أبيه عبدالملك