From Sahih Bukhari (Hadith 2951):
Narrated Anas:The Prophet (ﷺ) offered a four-rak`at Zuhr prayer at Medina and then offered a two rak`at `Asr prayer at Dhul-Hulaifa and I heard the companions of the Prophet (ﷺ) reciting Talbiya aloud (for Hajj and `Umra) altogether
Reference: Bukhari 2951