Sahih al-Bukhari, Volume 4, Book 52, Hadith 229 (USC-MSA) ⓘ
Narrated Anas: I was riding behind Abu Talha (on the same) riding animal and (the Prophet's companions) were reciting Talbiya aloud for both Hajj and `Umra.
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا عَبْدُ الْوَهَّابِ، حَدَّثَنَا أَيُّوبُ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ كُنْتُ رَدِيفَ أَبِي طَلْحَةَ، وَإِنَّهُمْ لَيَصْرُخُونَ بِهِمَا جَمِيعًا الْحَجِّ وَالْعُمْرَةِ.
also referenced under: Book 56, Hadith 195 (In-Book) & Hadith 2986 (DarusSalam)