I offered the prayer with the Prophet, Abu Bakr and ʿUmar at Mina and it was of two rakʿat. ʿUthman in the early days of his caliphate did the same, but later on he started praying the full prayer.  

صَلَّيْتُ مَعَ النَّبِيِّ ﷺ بِمِنًى رَكْعَتَيْنِ وَأَبِي بَكْرٍ وَعُمَرَ وَمَعَ عُثْمَانَ صَدْرًا مِنْ إِمَارَتِهِ ثُمَّ أَتَمَّهَا  

Salim b. 'Abdullah (b. 'Umar) reported on the authority of his father that Messenger of Allah ﷺ observed the prayer of a traveller, i. e. two rak'ahs in Mina, and other places; so did Abu Bakr and 'Umar, and 'Uthman too observed two rak'ahs at the beginning of his caliphate, but he then completed four.  

عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ صَلَّى صَلاَةَ الْمُسَافِرِ بِمِنًى وَغَيْرِهِ رَكْعَتَيْنِ وَأَبُو بَكْرٍ وَعُمَرُ وَعُثْمَانُ رَكْعَتَيْنِ صَدْرًا مِنْ خِلاَفَتِهِ ثُمَّ أَتَمَّهَا أَرْبَعًا  

"I prayed two rak'ahs with the Messenger of Allah ﷺ in Mina, and with Abu Bakr and 'Umar, and two rak'ahs with 'Uthman at the beginning of his Caliphate."  

أَنَّهُ قَالَ صَلَّيْتُ مَعَ رَسُولِ اللَّهِ ﷺ بِمِنًى وَمَعَ أَبِي بَكْرٍ وَعُمَرَ رَكْعَتَيْنِ وَمَعَ عُثْمَانَ رَكْعَتَيْنِ صَدْرًا مِنْ إِمَارَتِهِ  

"I prayed two rak'ahs with the Messenger of Allah ﷺ in Mina, and two rak'ahs with Abu Bakr, may Allah (SWT) be pleased with him, and two rak'ahs with Umar, may Allah ﷺ be pleased with him."  

صَلَّيْتُ مَعَ النَّبِيِّ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ ؓ رَكْعَتَيْنِ وَمَعَ عُمَرَ ؓ رَكْعَتَيْنِ  

His father said: "The Messenger of Allah ﷺ prayed two rak'ahs in Mina, and Abu Bakr prayed two rak'ahs, and Umar prayed two rak'ahs, and Uthman prayed (two rak'ahs) at the beginning of his Khilafah."  

صَلَّى رَسُولُ اللَّهِ ﷺ بِمِنًى رَكْعَتَيْنِ وَصَلاَّهَا أَبُو بَكْرٍ رَكْعَتَيْنِ وَصَلاَّهَا عُمَرُ رَكْعَتَيْنِ وَصَلاَّهَا عُثْمَانُ صَدْرًا مِنْ خِلاَفَتِهِ  

[Machine] "I prayed alongside the Messenger of Allah ﷺ in Mina for two units of prayer, and with Abu Bakr for two units of prayer, and with Umar for two units of prayer. I wish for my share of four units of prayer to be accepted."  

صَلَّيْتُ مَعَ رَسُولِ اللهِ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ فَلَيْتَ حَظِّي مِنْ أَرْبَعٍ رَكْعَتَانِ مُتَقَبَّلَتَانِ  

"I prayed two rak'ahs with the Messenger of Allah ﷺ on a journey, and two rak'ahs with Abu Bakr, and two rak'ahs with 'Umar, may Allah (SWT) be pleased with them both." (Using translation from Nasāʾī 1439)   

صَلَّيْتُ مَعَ رَسُولِ اللهِ ﷺ رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ  

[Machine] I prayed the night prayer (Isha) with the Messenger of Allah ﷺ in Mina, two units of prayer. And with Abu Bakr, two units of prayer. And with Umar, two units of prayer. And with Uthman, two units of prayer, separately from his caliphate. Then he completed it after Uthman.  

صَلَّيْتُ مَعَ رَسُولِ اللهِ ﷺ صَلَاةَ الْعِشَاءِ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ وَمَعَ عُثْمَانَ رَكْعَتَيْنِ صَدْرًا مِنْ خِلَافَتِهِ ثُمَّ أَتَمَّهَا بَعْدُ عُثْمَانُ  

"I prayed two rak'ahs with the Messenger of Allah ﷺ in Mina, and with Abu Bakr and 'Umar, and two rak'ahs with 'Uthman at the beginning of his Caliphate." (Using translation from Nasāʾī 1447)   

صَلَّيْتُ مَعَ رَسُولِ اللهِ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ وَمَعَ عُثْمَانَ صَدْرًا مِنْ خِلَافَتِهِ ثُمَّ صَلَّاهَا أَرْبَعًا  

"I prayed two rak'ahs with the Messenger of Allah ﷺ in Mina, and with Abu Bakr and 'Umar, and two rak'ahs with 'Uthman at the beginning of his Caliphate." (Using translation from Nasāʾī 1447)   

أَنَّهُ قَالَ صَلَّيْتُ مَعَ رَسُولِ اللهِ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ وَمَعَ عُثْمَانَ رَكْعَتَيْنِ صَدْرًا مِنْ إِمَارَتِهِ  

"I prayed two rak'ahs with the Messenger of Allah ﷺ in Mina, and with Abu Bakr and 'Umar, and two rak'ahs with 'Uthman at the beginning of his Caliphate." (Using translation from Nasāʾī 1447)   

أَنَّهُ قَالَ صَلَّيْتُ مَعَ رَسُولِ اللهِ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ وَمَعَ عُثْمَانَ رَكْعَتَيْنِ صَدْرًا مِنْ إِمَارَتِهِ  

"I prayed two rak'ahs with the Messenger of Allah ﷺ in Mina, and two rak'ahs with Abu Bakr, may Allah (SWT) be pleased with him, and two rak'ahs with Umar, may Allah ﷺ be pleased with him." (Using translation from Nasāʾī 1450)   

عَبْدُ اللهِ صَلَّيْتُ مَعَ النَّبِيِّ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ  

I offered the prayer with the Prophet, Abu Bakr and ʿUmar at Mina and it was of two rakʿat. ʿUthman in the early days of his caliphate did the same, but later on he started praying the full prayer. (Using translation from Bukhārī 1082)  

صَلَّيْتُ مَعَ النَّبِيِّ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ وَمَعَ عُمَرَ وَعُثْمَانَ صَدْرًا مِنْ إِمَارَتِهِ ثُمَّ أَتَمَّ  

[Machine] I prayed with the Prophet ﷺ in Mina two units of prayer, and with Abu Bakr, with Umar, and with Uthman, shoulder to shoulder, as part of his leadership, then I completed.  

صَلَّيْتُ مَعَ النَّبِيِّ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ وَمَعَ عُمَرَ وَمَعَ عُثْمَانَ صَدْرًا مِنْ إِمَارَتِهِ ثُمَّ أَتَمَّ  

Salim b. 'Abdullah (b. 'Umar) reported on the authority of his father that Messenger of Allah ﷺ observed the prayer of a traveller, i. e. two rak'ahs in Mina, and other places; so did Abu Bakr and 'Umar, and 'Uthman too observed two rak'ahs at the beginning of his caliphate, but he then completed four. (Using translation from Muslim 694a)  

«أَنَّ رَسُولَ اللَّهِ ﷺ صَلَّى صَلَاةَ الْمُسَافِرِ بِمِنًى رَكْعَتَيْنِ وَأَبُو بَكْرٍ وَعُمَرُ وَعُثْمَانُ رَكْعَتَيْنِ صَدْرًا مِنْ خِلَافَتِهِ ثُمَّ أَتَمَّهَا أَرْبَعًا»  

[Machine] I prayed with the Prophet ﷺ in Mina two units of prayer, and with Abu Bakr two units of prayer, and with Umar two units of prayer, while the people of Israel differed with them.  

صَلَّيْتُ مَعَ النَّبِيِّ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ وَخَالَفَهُمْ إِسْرَائِيلُ  

[Machine] I prayed with the Prophet ﷺ in Mina, two units of prayer. And I prayed with Abu Bakr, two units of prayer. And I prayed with Umar, two units of prayer.  

صَلَّيْتُ مَعَ النَّبِيِّ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ  

[Machine] I prayed with the Prophet ﷺ in Mina two Rak'ahs, and with Abu Bakr two Rak'ahs, and with Umar two Rak'ahs, and with Uthman four Rak'ahs.  

صَلَّيْتُ مَعَ النَّبِيِّ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ وَمَعَ عُثْمَانَ أَرْبَعَ رَكَعَاتٍ  

"I prayed two rak'ahs with the Messenger of Allah ﷺ in Mina, and with Abu Bakr and 'Umar, and two rak'ahs with 'Uthman at the beginning of his Caliphate." (Using translation from Nasāʾī 1447)   

صَلَّيْتُ مَعَ رَسُولِ اللهِ ﷺ بِمَكَّةَ وَبِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ وَمَعَ عُثْمَانَ صَدْرًا مِنْ خِلَافَتِهِ رَكْعَتَيْنِ  

"I prayed two rak'ahs with the Messenger of Allah ﷺ in Mina, and with Abu Bakr and 'Umar, and two rak'ahs with 'Uthman at the beginning of his Caliphate." (Using translation from Nasāʾī 1447)  

أَنَّهُ قَالَ «صَلَّيْتُ مَعَ رَسُولِ اللهِ ﷺ بِمِنًى وَمَعَ أَبِي بَكْرٍ وَمَعَ عُمَرَ رَكْعَتَيْنِ وَمَعَ عُثْمَانَ رَكْعَتَيْنِ صَدْرًا مِنْ إِمَارَتِهِ»  

"I prayed two rak'ahs with the Messenger of Allah ﷺ in Mina, and two rak'ahs with Abu Bakr, may Allah (SWT) be pleased with him, and two rak'ahs with Umar, may Allah ﷺ be pleased with him." (Using translation from Nasāʾī 1450)  

«صَلَّيْتُ مَعَ النَّبِيِّ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ»  

His father said: "The Messenger of Allah ﷺ prayed two rak'ahs in Mina, and Abu Bakr prayed two rak'ahs, and Umar prayed two rak'ahs, and Uthman prayed (two rak'ahs) at the beginning of his Khilafah." (Using translation from Nasāʾī 1451)  

«صَلَّى رَسُولُ اللهِ ﷺ بِمِنًى رَكْعَتَيْنِ وَصَلَّاهَا أَبُو بَكْرٍ رَكْعَتَيْنِ وَصَلَّاهَا عُمَرُ رَكْعَتَيْنِ وَصَلَّاهَا عُثْمَانُ صَدْرًا مِنْ خِلَافَتِهِ رَكْعَتَيْنِ»  

[Machine] I prayed with the Prophet Muhammad ﷺ two units of prayer in Mina, two units of prayer with Abu Bakr, two units of prayer with Umar, and four units of prayer with Uthman during his caliphate.  

صَلَّيْتُ مَعَ النَّبِيِّ ﷺ بِمِنًى رَكْعَتَيْنِ وَمَعَ أَبِي بَكْرٍ رَكْعَتَيْنِ وَمَعَ عُمَرَ رَكْعَتَيْنِ وَمَعَ عُثْمَانَ صَدْرًا مِنْ خِلَافَتِهِ ثُمَّ صَلَّى أَرْبَعًا  

"عَنْ أَنسٍ قَالَ: صليتُ معَ رسولِ الله ﷺ بمنى ركعتين، ومع أبى بكر ركعتين، ومع عمرَ بن الخطاب ركعتين، ومع عثمانَ بن عفان ركعتين صدرًا من خلافته، فلما كان آخر خلافته أتم الصلاة بمنى أربعًا".