Musannaf Ibn Abi Shayba 3:4720

Abdah ibn Sulayman narrated to us, from Ibn Abi Arubah, from Sulayman al-Naji, from Abu al-Mutawakkil, from Abu Sa’id, who said: A man came while the Prophet (ﷺ) had already prayed. He (the Prophet) said: "Who will trade with this (man)?" A man from the people stood up and prayed with him.