《仪礼·少牢馈食礼》
上佐食洗手登堂入席，下佐食亦洗手登堂，并坐在上佐食的对面，宾长二人也都洗手登堂入席，一坐于上佐食之北，一坐于下佐食之南，两佐食两宾长，四人之席完备。
司士进一敦于上佐食，又进一敦黍于下佐食，皆右之于席上。
The Shang Zuo ritual food washed his hands and went up to the hall to take his seat. The Xia Zuo ritual food also washed his hands and went up to the hall to sit opposite the Shang Zuo ritual food. The two guests also washed their hands and went up to the hall to take their seats, one sitting to the north of the Shang Zuo ritual food and one sitting to the south of the Xia Zuo ritual food. The two Zuo ritual food and two guests were complete.