Sahih al-Bukhari 607

Arabic

حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا خَالِدٌ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَنَسٍ، قَالَ أُمِرَ بِلاَلٌ أَنْ يَشْفَعَ، الأَذَانَ، وَأَنْ يُوتِرَ الإِقَامَةَ‏.‏ قَالَ إِسْمَاعِيلُ فَذَكَرْتُ لأَيُّوبَ فَقَالَ إِلاَّ الإِقَامَةَ‏.‏

English translation

Narrated Abu Qilaba:Anas said, "Bilal was ordered to pronounce the wording of Adhan twice and of Iqama once only." The sub narrator Isma`il said, "I mentioned that to Aiyub and he added (to that), "Except Iqama (i.e. Qad-qamat-is-salat which should be said twice)

Reference: Sahih al-Bukhari 607, Book of Call to Prayers (Adhaan). English translation by Dr. Muhammad Muhsin Khan.