大乘義章 12.115

12.115

八戒齊義七門分別（一釋名定數　二辨相　三具得因緣　四界趣分別　五形報分別　六對境分別　七受持之義）

The doctrine of the eightfold fasting precepts (aṣṭāṅga-upoṣadha) is differentiated through seven gates: (1) explaining the name and determining the number; (2) differentiating the characteristics; (3) the conditions for complete attainment; (4) differentiation by realm and destiny; (5) differentiation by physical bodily form; (6) differentiation with respect to the intentional object; (7) the principle of receiving and observing.