Ali bin al-Madini (may Allah have mercy on him) said: "Which of the two do you consider athbat (more reliable) in narrating from al-Aswad, Urwah or Ibrahim?" Then Ali bin al-Madini (may Allah have mercy on him) said: "The people of Hijaz are athbat (more reliable)." The Shaykh (may Allah have mercy on him) said: Ali means that the narration of Urwah and those like him from the people of Hijaz is more authentic than the narration of the people of Kufah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14282