Musannaf Ibn Abi Shayba 3:5593

Waki' narrated to us, he said: Sufyan narrated to us, from Yunus, from Mujahid, who said: When the Imam says, "Not of those who have evoked [Your] anger or of those who are astray," say: "O Allah, I ask You for Paradise, and I seek refuge in You from the Fire."