Musnad Abu Ya'la al-Mawsili 153:9

And from his father, that the Messenger of Allah (may Allah bless him and grant him peace) appointed for the people of Medina, Dhu al-Hulayfah; and for the people of al-Sham, al-Juhfah; and for the people of Najd, Qarn. And he mentioned it to Ibn Umar, but he did not hear it [from the Prophet]. And for the people of Yemen, Yalamlam.