Anas bin Malik said I heard the Apostle of Allaah ﷺ uttering talbiyah(labbaik) aloud for both Hajj and ‘Umrah. He was saying in a loud voice “Labbaik for ‘Umrah and Hajj, labbaik for ‘Umrah and Hajj”. (Using translation from Abū Dāʾūd 1795)
سَمِعْتُ رَسُولَ اللهِ ﷺ يُلَبِّي بِالْحَجِّ وَالْعُمْرَةِ جَمِيعًا يَقُولُ لَبَّيْكَ عُمْرَةً وَحَجًّا لَبَّيْكَ عُمْرَةً وَحَجًّا