Uthman offered complete prayer at Mina for the sake of bedouins who attended (hajj) in large numbers that year. He led the people four rak'ahs in prayer in order to teach them that the prayer (i.e. noon or afternoon prayer) essentially contained four rak'ahs.  

أَنَّ الصَّلاَةَ أَرْبَعٌ  

[Machine] "That the Prophet ﷺ performed prayer in the house."  

«أَنَّ النَّبِيَّ ﷺ صَلَّى فِي الْبَيْتِ»  

[Machine] "The Prophet, ﷺ , prayed in the house."  

«أَنَّ النَّبِيَّ ﷺ صَلَّى فِي الْبَيْتِ»  

It was narrated from Ibn Buraidah from his father that the Prophet ﷺ offered the funeral prayer for a deceased person after he had been buried. (Using translation from Ibn Mājah 1532)  

أَنَّ النَّبِيَّ ﷺ «صَلَّى عَلَى مَيِّتٍ بَعْدَ مَا دُفِنَ»  

[Machine] "That the Prophet, ﷺ , prayed beside a camel."  

«أَنَّ النَّبِيَّ ﷺ صَلَّى إِلَى بَعِيرٍ»  

Uthman offered complete prayer at Mina for the sake of bedouins who attended (hajj) in large numbers that year. He led the people four rak'ahs in prayer in order to teach them that the prayer (i.e. noon or afternoon prayer) essentially contained four rak'ahs. (Using translation from Abū Dāʾūd 1964)   

أَنَّ الصَّلَاةَ أَرْبَعٌ