大方廣佛華嚴經疏 57.57

57.57

第四謙己推勝中，加清淨法門者，遍至本為說法故，即前所說。後二可知。

Fourth, within humbling himself and exalting others, adding the pure Dharma-door is because reaching everywhere is fundamentally for the sake of expounding the Dharma, which is what was spoken previously. The latter two can be understood.