Narrated Umar ibn al-Khattab:As-Subayy ibn Ma'bad said: I raised my voice in talbiyah for both of them (i.e. umrah and hajj). Thereupon Umar said: You were guided to the practice (sunnah) of your Prophet (ﷺ).
حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا جَرِيرُ بْنُ عَبْدِ الْحَمِيدِ، عَنْ مَنْصُورٍ، عَنْ أَبِي وَائِلٍ، قَالَ قَالَ الصُّبَىُّ بْنُ مَعْبَدٍ أَهْلَلْتُ بِهِمَا مَعًا . فَقَالَ عُمَرُ هُدِيتَ لِسُنَّةِ نَبِيِّكَ صلى الله عليه وسلم .
AbuDaud
The Rites of Hajj (Kitab Al-Manasik Wa'l-Hajj) • Hadith 1798