"I asked Ibn 'Umar about the Adhan and he said: 'At the time of the Messenger of Allah ﷺ, the phrases of the Adhan were recited twice and the phrases of Iqamah once, except that you should say (the phrase) Qad qamat is-salah (prayer is about to begin)twice. When we heard 'prayer is about to begin' we would perform Wudu' and go out to pray.'"  

كَانَ الأَذَانُ عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ مَثْنَى مَثْنَى وَالإِقَامَةُ مَرَّةً مَرَّةً إِلاَّ أَنَّكَ إِذَا قُلْتَ قَدْ قَامَتِ الصَّلاَةُ قَالَهَا مَرَّتَيْنِ فَإِذَا سَمِعْنَا قَدْ قَامَتِ الصَّلاَةُ تَوَضَّأْنَا ثُمَّ خَرَجْنَا إِلَى الصَّلاَةِ  

"At the time of the Messenger of Allah ﷺ the phrases of the Adhan were said twice and the phrases of the Iqamah were said once, except that you should say: 'Qad Qamatis-Salah, Qad Qamatis-Salah (prayer is about to begin, prayer is about to begin).'" (Using translation from Nasāʾī 628)   

كَانَ الْأَذَانُ عَلَى عَهْدِ رَسُولِ اللهِ ﷺ مَثْنَى مَثْنَى وَالْإِقَامَةُ وَاحِدَةً غَيْرَ أَنَّ الْمُؤَذِّنَ كَانَ إِذَا قَالَ قَدْ قَامَتِ الصَّلَاةُ قَالَ قَدْ قَامَتِ الصَّلَاةُ مَرَّتَيْنِ  

"I asked Ibn 'Umar about the Adhan and he said: 'At the time of the Messenger of Allah ﷺ, the phrases of the Adhan were recited twice and the phrases of Iqamah once, except that you should say (the phrase) Qad qamat is-salah (prayer is about to begin)twice. When we heard 'prayer is about to begin' we would perform Wudu' and go out to pray.'" (Using translation from Nasāʾī 668)   

أَنَّهُ قَالَ كَانَ الْأَذَانُ عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ مَثْنَى مَثْنَى وَالْإِقَامَةُ مَرَّةً غَيْرَ أَنَّهُ كَانَ إِذَا قَالَ قَدْ قَامَتِ الصَّلَاةُ قَالَهَا مَرَّتَيْنِ فَإِذَا سَمِعْنَا الْإِقَامَةَ تَوَضَّأَ أَحَدُنَا وَخَرَجَ  

The words of adhan were pronounced from the time of the Messenger of Allah ﷺ twice in pairs (i.e. four times) each, and the words of iqamah were pronounced once in pairs (twice each), except that the phrase "The time for prayer has come" would be pronounced twice. When we heard iqamah, we would perform ablution, and go out for prayer. Shu'bah said: I did not hear AbuJa'far narrating any other tradition except this one. (Using translation from Abū Dāʾūd 510)   

«إِنَّمَا كَانَ الْأَذَانُ عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ مَرَّتَيْنِ وَالْإِقَامَةُ مَرَّةً غَيْرَ أَنَّهُ يَقُولُ قَدْ قَامَتِ الصَّلَاةُ قَدْ قَامَتِ الصَّلَاةُ فَإِذَا سَمِعْنَا الْإِقَامَةَ تَوَضَّأْنَا ثُمَّ جِئْنَا إِلَى الصَّلَاةِ»  

[Machine] I heard Ibn Umar saying, "During the time of the Prophet ﷺ, the Adhan (call to prayer) was repeated twice, and the Iqamah (second call to prayer) was performed once, except that he used to say, 'The prayer has been established twice.'"  

سَمِعْتُ ابْنَ عُمَرَ يَقُولُ «كَانَ الْأَذَانُ عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ مَثْنَى مَثْنَى وَالْإِقَامَةُ وَاحِدَةٌ غَيْرَ أَنَّهُ يَقُولُ قَدْ قَامَتِ الصَّلَاةُ مَرَّتَيْنِ»  

"At the time of the Messenger of Allah ﷺ the phrases of the Adhan were said twice and the phrases of the Iqamah were said once, except that you should say: 'Qad Qamatis-Salah, Qad Qamatis-Salah (prayer is about to begin, prayer is about to begin).'" (Using translation from Nasāʾī 628)  

كَانَ الْأَذَانُ عَلَى عَهْدِ النَّبِيِّ ﷺ مَثْنَى مَثْنَى وَالْإِقَامَةُ مَرَّةً إِلَّا أَنَّكَ تَقُولُ قَدْ قَامَتِ الصَّلَاةُ قَدْ قَامَتِ الصَّلَاةُ  

[Machine] The adhan during the time of the Messenger of Allah ﷺ was said in pairs, and the iqamah was said once, except that the caller, when saying, "Prayer is about to begin," would say it twice.  

كَانَ الْأَذَانُ عَلَى عَهْدِ رَسُولِ اللهِ ﷺ مَثْنَى مَثْنَى وَالْإِقَامَةُ مَرَّةً مَرَّةً غَيْرَ أَنَّ الْمُؤَذِّنَ إِذَا قَالَ قَدْ قَامَتِ الصَّلَاةُ قَالَ مَرَّتَيْنِ  

"كَانَ بلاَلٌ يُثنِّي الأَذَانَ وَيُوتِرُ الإقَامةَ إلى قَوْلِهِ: قَدْ قَامَتِ الصَّلاةُ، قَدْ قَامَتِ الصَّلاَةُ".