大方廣佛華嚴經隨疏演義鈔 60.102

60.102

疏「三大義」下三句，亦前二正明德行圓滿、後一寄對顯勝，不雜外道故。言大義者，義即義利，利他德廣故名為大。

Regarding the commentary's "Three: great benefit" and the three lines below: the first two also directly clarify the perfection of virtuous conduct, and the latter one relies on contrast to reveal superiority, because it is not mixed with outsiders. As for "great benefit," benefit means welfare and benefit; because the virtue of benefiting others is vast, it is called "great."