釋氏要覽 2.11

2.11

南方以抽坐具為禮。律檢無文。按僧史略云。近以開坐具便為禮者。得以論之。昔梵僧到此。皆展尼師壇。就上作禮。後世避煩。尊者方見開尼師壇即止之。便通敘暄涼。又展之猶再拜也。尊者又止之。由此只將尼師壇。擬展為禮之數。所謂蓌拜也（蓌音挫拜失容又云詐也）如此設恭。無乃太簡乎。然隨方為清淨者。不得不行也。

In the South, drawing out the sitting cloth is used as a form of etiquette, yet there is no text for this in an examination of the Vinaya. According to the Seng shilüe: Recently, unfolding the sitting cloth has come to serve as etiquette, which may be discussed. Formerly, when Indian monks arrived here, they all unfolded the niṣīdanam and paid homage upon it. Later generations avoided trouble: the venerable master, upon seeing the niṣīdanam being unfolded, would immediately halt them, and then they would exchange pleasantries about the weather. Unfolding it again was like prostrating a second time, and the venerable master would halt them again. From this, merely intending to unfold the niṣīdanam came to serve as the measure of etiquette, which is called a cuobai (cuo has the sound of cuo; it means a bow that loses proper demeanor, and is also said to mean feigned). Showing respect like this: is it not overly brief? However, since whatever accords with regional custom is pure, one cannot help but practice it.