Musannaf Ibn Abi Shayba 28:566

Waki’ narrated to us, he said: Sufyan narrated to us, from al-Aswad ibn Qays al-‘Abdi, from Shibr ibn ‘Alqama, who said: When it was the day of al-Qadisiyyah, a man from the people of Persia stood up and called for a duel, and he mentioned his greatness. A short man stood up to him, who was called Shibr ibn ‘Alqama. He said: The Persian said to him—meaning he lifted him up—then he struck the ground with him and threw him down. He said: So Shibr took a dagger that was with the Persian and said: In his stomach—meaning he ripped it open—then he turned over on him and killed him. Then he brought his spoils to Sa’d, who valued them at twelve thousand, and he gave them to him as a voluntary gift (nafal).