四分律比丘含注戒本 2.670

2.670

若欲誦者，當誦四事。若必欲誦者，當四事、十三事，餘者不須誦。何以故？

("If you wish to recite, you should recite the four matters. If you must recite, then the four matters and the thirteen matters; there is no need to recite the rest. Why is that?")