Musannaf Ibn Abi Shayba 16:284

Abu Bakr narrated to us, he said: Mu'awiyah ibn Hisham narrated to us, he said: 'Ammar ibn Ruzayq informed us, from Ibrahim ibn Abi Hafsah, from Sa'id ibn Jubayr, that he said: "When the food is placed and you have mentioned the name of Allah (said Bismillah) over everything that is brought, then the first mention of the name is sufficient for you."