四分律行事鈔資持記 2.27

2.27

次難所出者。如上諸文，具依律論；欲彰有據，生後勸勉，故發是問。

Regarding "the source of the second objection": The passages above are entirely based on the Vinaya and treatises; wishing to make evident that there is scriptural authority, and to generate subsequent exhortation, this question was raised.