大方廣佛華嚴經隨疏演義鈔 48.29

48.29

疏「以三三昧為所入門」者，即義引也。彼經云「空無相無願解脫為所入門」，故疏以經配三門相。言「入不思議三昧通該前後」者，該前明空等為不思議三昧故，該後以三昧等為攝益故。

The Commentary states: "Having the three samādhis as the gateways of entry." This is a citation of the meaning. That sūtra says: "Having the liberations of emptiness, signlessness, and wishlessness as the gateways of entry." Thus the Commentary correlates the sūtra with the characteristics of the three gateways. The phrase "entry into the inconceivable samādhi pervades both before and after" means that it pervades the preceding by explaining that emptiness and the rest are the inconceivable samādhi, and it pervades the succeeding because the samādhis and the rest constitute the gathered benefit.