Hadithcore
Sunan Abi Dawud, 1798
sahih· Al-Albani

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 ‏.‏

References2 variants
In-Book Reference
Book 11, Hadith 78
English Reference
Book 10, Hadith 1794