四分律行事鈔資持記 3.47

3.47

三中。一端，此間謂之一疋。指作謂指擬欲作而未作也。五肘，謂取長五廣三肘體，是法衣量，不須說淨；已外須說。（引此證前，定量彌顯。）

In the third section: 'One bolt' (duan) is here called one pi. 'Designating to make' means intending to make it when it has not yet been made. 'Five cubits' means taking a body of five cubits in length and three cubits in width, which is the measure of a Dharma robe and does not require deśanā; beyond this, it must be declared. (Citing this corroborates the preceding, making the fixed measurement even more evident.)