Imam Ahmad bin Hambal on the Thughur
Abdullah bin Mahmud bin al-Faraj narrated:
“I heard ‘Abdullah bin Ahmad bin Hambal say: “My father went out to Tarsus [*] and guarded the frontlines and fought there. My father said: “I saw knowledge dying there.”””
[‘Siyar A’lam an-Nubala”; 9/517]
[*] A city in present-day Turkey, where the Muslims were fighting the Romans.