Musnad Abu Ya'la al-Mawsili 110:169

Abu Bakr narrated to us, Ibn Numayr and 'Abd al-A'la narrated to us, they said: Muhammad ibn Ishaq narrated to us, from Ayyub ibn Musa, from 'Ata', from Ibn 'Abbas, he said: The price of a shield during the era of the Messenger of Allah, may Allah bless him and grant him peace, was ten dirhams.