Marw al-Rudh

Marw al-Rudh ('Merv on the river'), in the historic region of Khurasan in present-day northern Afghanistan (Bala Murghab region), was a town on the upper Murghab river, distinct from the larger Merv (Marw al-Shahijan) to its north. The Shafi'i Qur'an commentator and hadith scholar al-Baghawi (d. c. 1122), author of Ma'alim al-Tanzil and Masabih al-Sunna, took his nisba from nearby Bagh/Baghshur in this region.