四分律行事鈔資持記 1.227

1.227

指出中。經律即如前引。非出一處，故云參校。亦下，此指當時，今亦多有。

In "pointing out": The sūtras and vinayas are just as cited previously. They do not come from a single source, which is why it is called "cross-referencing." Beginning with "also" (亦), this points to that time; today there are also many [such cases].