Musannaf Ibn Abi Shaybah 34653 — The virtue of the Arabs

Qays (may Allah have mercy on him) said: Sayyiduna Amr bin Ma'dikarib (may Allah be pleased with him) passed by us on the day of al-Qadisiyyah while we were in rows, and he (may Allah be pleased with him) said: "O company of Arabs! Be lions that attack fiercely. Indeed, the lion is unconcerned about its state. The Persian is nothing but a billy-goat once he has thrown his spear."