觀無量壽佛經疏 4.85

4.85

四、從聞此事已下，至極樂世界已來，正明第九門中得生之益去時遲疾也。

Fourth, from "having heard this" down to "the Land of Utmost Bliss," it directly clarifies, under the ninth gateway, the benefit of attaining rebirth and the speed of departure.