法華文句記 2.120

2.120

前所說經灼然成序，重牒其名義兼於正，故使論引今為異名，名義兩兼序正雙得。

The sūtra expounded previously clearly constitutes an introduction; repeating its name in meaning partakes of the main body; this is why the treatise cites it now as an alternate name: both name and meaning are partaken of, and both the introduction and the main body are attained.