Sunan Ibn Majah
2976
Sahih+3

‘Umar bin Khattab said:I heard the Messenger of Allah (ﷺ) say, when he was in ‘Aqiq: “Someone came to me from my Lord and said: ‘Pray in this blessed valley and say: (I intend to do) ‘Umrah in Hajj.’”

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi