Musannaf Ibn Abi Shayba 3:1044

Yazid ibn Harun narrated to us, from Muhammad ibn ‘Amr, from Abu ‘Amr ibn Hammas, from Malik ibn Aws ibn al-Hadthan al-Basri (al-Nasri), that Abu Dharr entered the mosque. He came to a pillar and prayed two rak'ahs by it.