I heard (and he then carried the narration directly, I think to) the Messenger of Allah (ﷺ).
Sahih Muslim Book 15, Hadith 19
← Previous Hadith I was informed that he said that the people of Yemen should enter upon the state of Ihram at Yalamlam.

Sahih Muslim Book 15, Hadith 18 Next Hadith → I heard (and I think he carried it directly to the Messenger of Allah) him saying: For the people of Medina Dhu'l-Hulaifa is the place for entering upon the state of Ihram, and for (the people coming through the other way, i.e. Syria) it is Juhfa; for the people of Iraq it is Dhat al-'Irq; for the people of Najd it is Qarn (al-Manazil) and for the people of Yemen it is Yalamlam.

Sahih Muslim Book 15, Hadith 20