Musannaf Ibn Abi Shayba 3:6444

Al-Fadl ibn Dukayn narrated to us, he said: Al-Walid ibn Jumay' narrated to us, he said: A man whom I trust narrated to me: That Khalid ibn al-Walid led the people in prayer at al-Harrah, and he recited from various surahs. Then he turned to us when he finished and said: "Jihad kept me busy from learning the Quran."