דיגהה ניקאיה 1:187
SUJATOBhikkhusaṅghopi kho pāde pakkhāletvā āvasathāgāraṁ pavisitvā pacchimaṁ bhittiṁ nissāya puratthābhimukho nisīdi bhagavantameva purakkhatvā.
The Saṅgha of mendicants also washed their feet, entered the guest house, and sat against the west wall facing east, with the Buddha right in front of them.