Musannaf Ibn Abi Shayba 3:5922

Muhammad ibn Fudayl narrated to us, from ‘Ata’ ibn al-Sa’ib, from his father, from ‘Abdullah ibn ‘Amr, who said: The sun eclipsed during the time of the Messenger of Allah (may Allah bless him and grant him peace), so he stood and we stood with him. Then he said: "O people, indeed the sun and the moon are two signs from the signs of Allah. So when one of them eclipses, hasten to the mosques."