Biography:
Imam Abu Dawood
Biography
Travels Across Islamic Lands in Pursuit of Hadith:

Travels for the Acquisition and Narration of Hadith
He traveled to major centers of Islamic knowledge for the purpose of acquiring and narrating Hadith. These included Egypt, Syria, the Hijaz (Makkah and Madinah), Baghdad, Jazirah, Basra, and Khorasan, among others. He visited Baghdad multiple times and benefited from the hadith scholars of cities like Nishapur, Marw, and Isfahan.