Musannaf Ibn Abi Shayba 3:5912

Waki’ narrated to us, he said: Sufyan narrated to us, from Abu Ishaq, from Sulaym ibn ‘Abd al-Saluli, from Hudhayfah, who said: "If something stirs you up, and he says: 'Fighting and speaking have become permissible for you'—meaning during prayer."