Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
suyuti:3294a –

"Bilal was commanded to say the phrases of the Adhan twice and the phrases of the Iqamah once." (Using translation from Ibn Mājah 730)   

السيوطي:٣٢٩٤a –

"اشْفَع الأَذَانَ، وأَوْتِر الإِقامَةَ" .  

الخطيب عن أنس، [قط] الدارقطنى في السنن في الأفراد عن جابر

See similar narrations below:

Collected by Muslim, Ibn Mājah, Aḥmad, Dārimī, Ibn Ḥibbān, Nasāʾī's Kubrá, Bayhaqī, Suyūṭī
muslim:378d – ʿUbaydullāh b. ʿUmar al-Qawārīrī > ʿAbd al-Wārith b. Saʿīd And ʿAbd al-Wahhāb b. ʿAbd al-Majīd > Ayyūb > Abū Qilābah > Anas > Umir Bilāl

Bilal was commanded (by the Holy Prophet) to repeat the phrases twice in Adhan, and once in lqama.  

مسلم:٣٧٨d – وَحَدَّثَنِي عُبَيْدُ اللَّهِ بْنُ عُمَرَ الْقَوَارِيرِيُّ حَدَّثَنَا عَبْدُ الْوَارِثِ بْنُ سَعِيدٍ وَعَبْدُ الْوَهَّابِ بْنُ عَبْدِ الْمَجِيدِ قَالاَ حَدَّثَنَا أَيُّوبُ عَنْ أَبِي قِلاَبَةَ عَنْ أَنَسٍ قَالَ أُمِرَ بِلاَلٌ

أَنْ يَشْفَعَ الأَذَانَ وَيُوتِرَ الإِقَامَةَ  

ibnmajah:730 – Naṣr b. ʿAlī al-Jahḍamī > ʿUmar b. ʿAlī > Khālid al-Ḥadhhāʾ > Abū Qilābah > Anas > Umir Bilāl

"Bilal was commanded to say the phrases of the Adhan twice and the phrases of the Iqamah once."  

ابن ماجة:٧٣٠ – حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ الْجَهْضَمِيُّ حَدَّثَنَا عُمَرُ بْنُ عَلِيٍّ عَنْ خَالِدٍ الْحَذَّاءِ عَنْ أَبِي قِلاَبَةَ عَنْ أَنَسٍ قَالَ أُمِرَ بِلاَلٌ

أَنْ يَشْفَعَ الأَذَانَ وَيُوتِرَ الإِقَامَةَ  

ahmad:12001 – ʿAbd al-Wahhāb > Ayyūb > Abū Qilābah > Anas b. Mālik > Umir Bilāl

"Bilal was commanded to say the phrases of the Adhan twice and the phrases of the Iqamah once." (Using translation from Ibn Mājah 730)  

أحمد:١٢٠٠١ – حَدَّثَنَا عَبْدُ الْوَهَّابِ حَدَّثَنَا أَيُّوبُ عَنْ أَبِي قِلَابَةَ عَنْ أَنَسِ بْنِ مَالِكٍ قَالَ أُمِرَ بِلَالٌ

أَنْ يَشْفَعَ الْأَذَانَ وَيُوتِرَ الْإِقَامَةَ  

darimi:1230 – Abū al-Walīd al-Ṭayālisī And ʿAffān > Shuʿbah > Khālid al-Ḥadhhāʾ > Abū Qilābah > Anas > Umir Bilāl

"Bilal was commanded to say the phrases of the Adhan twice and the phrases of the Iqamah once." (Using translation from Ibn Mājah 730)  

الدارمي:١٢٣٠ – أَخْبَرَنَا أَبُو الْوَلِيدِ الطَّيَالِسِيُّ وَعَفَّانُ قَالَا حَدَّثَنَا شُعْبَةُ عَنْ خَالِدٍ الْحَذَّاءِ عَنْ أَبِي قِلَابَةَ عَنْ أَنَسٍ قَالَ

«أُمِرَ بِلَالٌ أَنْ يَشْفَعَ الْأَذَانَ وَيُوتِرَ الْإِقَامَةَ»  

darimi:1231 – Sulaymān b. Ḥarb > Ḥammād b. Zayd > Simāk b. ʿAṭiyyah > Ayyūb > Abū Qilābah > Anas > Umir Bilāl

Anas reported; Bilal was commanded to pronounce Adhan in double pairs and IQAMAH in single pairs. Hammam added in his version; “except IQAMAH”. (Using translation from Abū Dāʾūd 508)   

الدارمي:١٢٣١ – حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ عَنْ سِمَاكِ بْنِ عَطِيَّةَ عَنْ أَيُّوبَ عَنْ أَبِي قِلَابَةَ عَنْ أَنَسٍ قَالَ

«أُمِرَ بِلَالٌ أَنْ يَشْفَعَ الْأَذَانَ وَيُوتِرَ الْإِقَامَةَ إِلَّا الْإِقَامَةَ»  

ibnhibban:1675 – Abū Khalīfah > Muḥammad b. Kathīr al-ʿAbdī > Shuʿbah > Ayyūb > Abū Qilābah > Anas > Umir Bilāl

"Bilal was commanded to say the phrases of the Adhan twice and the phrases of the Iqamah once." (Using translation from Ibn Mājah 730)  

ابن حبّان:١٦٧٥ – أَخْبَرَنَا أَبُو خَلِيفَةَ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ كَثِيرٍ الْعَبْدِيُّ قَالَ أَنْبَأَنَا شُعْبَةُ عَنْ أَيُّوبَ عَنْ أَبِي قِلَابَةَ عَنْ أَنَسٍ قَالَ «أُمِرَ بِلَالٌ

أَنْ يَشْفَعَ الْأَذَانَ وَيُوتِرُ الْإِقَامَةَ»  

nasai-kubra:1604 – Qutaybah b. Saʿīd > ʿAbd al-Wahhāb > Ayyūb > Abū Qilābah > Anas

"The Messenger of Allah ﷺ commanded Bilal to say the phrases of the Adhan twice and the phrases of the Iqamah once." (Using translation from Nasāʾī 627)  

الكبرى للنسائي:١٦٠٤ – أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ قَالَ حَدَّثَنَا عَبْدُ الْوَهَّابِ عَنْ أَيُّوبَ عَنْ أَبِي قِلَابَةَ عَنْ أَنَسٍ

أَنَّ رَسُولَ اللهِ ﷺ «أَمَرَ بِلَالًا أَنْ يَشْفَعَ الْأَذَانَ وَأَنْ يُوتِرَ الْإِقَامَةَ»  

bayhaqi:1946 – Abū Ṭāhir al-Faqīh > Abū Ḥāmid b. Bilāl al-Bazzār > Abū al-Azhar > ʿAbd al-Wahhāb b. ʿAṭāʾ al-Khaffāf > Khālid > Abū Qilābah > Anas > Umir Bilāl

"Bilal was commanded to say the phrases of the Adhan twice and the phrases of the Iqamah once." (Using translation from Ibn Mājah 730)   

البيهقي:١٩٤٦ – أَخْبَرَنَا أَبُو طَاهِرٍ الْفَقِيهُ ثنا أَبُو حَامِدِ بْنُ بِلَالٍ الْبَزَّارُ ثنا أَبُو الْأَزْهَرِ ثنا عَبْدُ الْوَهَّابِ بْنُ عَطَاءٍ الْخَفَّافُ ثنا خَالِدٌ عَنْ أَبِي قِلَابَةَ عَنْ أَنَسٍ قَالَ أُمِرَ بِلَالٌ

أَنْ يشَفَعَ الْأَذَانَ وَيُوتِرَ الْإِقَامَةَ