The people mentioned the fire and the bell (they suggested those as signals to indicate the starting of prayers), and by that they mentioned the Jews and the Christians. Then Bilal was ordered to pronounce Adhan for the prayer by saying its wordings twice, and for the Iqama (the call for the actual standing for the prayers in rows) by saying its wordings once. (Iqama is pronounced when the people are ready for the prayer).  

ذَكَرُوا النَّارَ وَالنَّاقُوسَ فَذَكَرُوا الْيَهُودَ وَالنَّصَارَى فَأُمِرَ بِلاَلٌ أَنْ يَشْفَعَ الأَذَانَ وَأَنْ يُوتِرَ الإِقَامَةَ  

When the number of Muslims increased they discussed the question as to how to know the time for the prayer by some familiar means. Some suggested that a fire be lit (at the time of the prayer) and others put forward the proposal to ring the bell. Bilal was ordered to pronounce the wording of Adhan twice and of the Iqama once only.  

أَنْ يَعْلَمُوا وَقْتَ الصَّلاَةِ بِشَىْءٍ يَعْرِفُونَهُ فَذَكَرُوا أَنْ يُورُوا نَارًا أَوْ يَضْرِبُوا نَاقُوسًا فَأُمِرَ بِلاَلٌ أَنْ يَشْفَعَ الأَذَانَ وَأَنْ يُوتِرَ الإِقَامَةَ  

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

أَنْ يَشْفَعَ الأَذَانَ وَيُوتِرَ الإِقَامَةَ  

"The Messenger of Allah ﷺ commanded Bilal to say the phrases of the Adhan twice and the phrases of the Iqamah once."  

إِنَّ رَسُولَ اللَّهِ ﷺ أَمَرَ بِلاَلاً أَنْ يَشْفَعَ الأَذَانَ وَأَنْ يُوتِرَ الإِقَامَةَ  

Anas reported; Bilal was commanded to pronounce Adhan in double pairs and IQAMAH in single pairs. Hammam added in his version; “except IQAMAH”.  

أَنْ يَشْفَعَ الأَذَانَ وَيُوتِرَ الإِقَامَةَ زَادَ حَمَّادٌ فِي حَدِيثِهِ إِلاَّ الإِقَامَةَ  

"They looked for something by means of which they could call out informing of (the time of) the prayer. Then Bilal was commanded to say the phrases of the Adhan twice and the phrases of the Iqamah once."  

الْتَمَسُوا شَيْئًا يُؤْذِنُونَ بِهِ عِلْمًا لِلصَّلاَةِ فَأُمِرَ بِلاَلٌ أَنْ يَشْفَعَ الأَذَانَ وَيُوتِرَ الإِقَامَةَ  

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

أَنْ يَشْفَعَ الأَذَانَ وَيُوتِرَ الإِقَامَةَ  

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

«أُمِرَ بِلَالٌ أَنْ يَشْفَعَ الْأَذَانَ وَيُوتِرَ الْإِقَامَةَ»  

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)   

«أُمِرَ بِلَالٌ أَنْ يَشْفَعَ الْأَذَانَ وَيُوتِرَ الْإِقَامَةَ إِلَّا الْإِقَامَةَ»  

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

أَنْ يَشْفَعَ الْأَذَانَ وَيُوتِرُ الْإِقَامَةَ»  

"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)  

«أَنَّ رَسُولَ اللَّهِ ﷺ أَمَرَ بِلَالًا أَنْ يَشْفَعَ الْأَذَانَ وَيُوتِرَ الْإِقَامَةَ»  

"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)  

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

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

أَنْ يشَفَعَ الْأَذَانَ وَيُوتِرَ الْإِقَامَةَ  

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

أَمَرَ رَسُولُ اللهِ ﷺ بِلَالًا أَنْ يَشْفَعَ الْأَذَانَ وَيُوتِرَ الْإِقَامَةَ  

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

"اشْفَع الأَذَانَ، وأَوْتِر الإِقامَةَ" .  

"عَنْ أَنَسٍ أَنَّ النَّبِي ﷺ أمَرَ بِلاَلًا: أنْ يَشْفَعَ الأذَانَ وَيُوتِرَ الإِقَامَةَ".  

"أمَرَ النبِيّ ﷺ بلاَلًا أنْ يَشْفع الأذَانَ، وَيُوتِرَ الإقَامَةَ".  

"أمِرَ بِلاَلٌ أنْ يَشْفَعَ الأذَانَ وَيُوتِرَ الإقَامَةَ إِلاَّ الإقَامَةَ".  

"عَنْ أنَس قَالَ: أمِرَ بِلاَل أنْ يَشْفَعَ الأذَانَ، وَيُوتِر الإِقَامَة".