أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ بُكَيْرٍ، عَنْ مُحَمَّدِ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي سُلَيْمٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّهُ قَالَ صَلَّيْتُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم بِمِنًى وَمَعَ أَبِي بَكْرٍ وَعُمَرَ رَكْعَتَيْنِ وَمَعَ عُثْمَانَ رَكْعَتَيْنِ صَدْرًا مِنْ إِمَارَتِهِ ‏.‏

It was narrated from Anas bin Malik that he said: "I prayed two rak'ahs with the Messenger of Allah (PBUH) in Mina, and with Abu Bakr and 'Umar, and two rak'ahs with 'Uthman at the beginning of his Caliphate." Translation Not Available

Book reference: Sunan An Nisai Book 15 Hadith 1447
Web reference: Sunan An Nisai Volume 2 Book 15 Hadith 1448