阿彌陀經疏 1.216

1.216

經曰：「所以者何？得與如是諸上善人俱會一處」，次釋第五勸生意。所以我勸汝願生彼國者，得與一生補處菩薩共聚會故。

The sūtra states: “Why is this? Because one will be able to assemble together in one place with such superior good persons.” Next, this explains the fifth [point], the reason for urging rebirth. The reason I urge you to aspire to be born in that land is that you will be able to assemble together with bodhisattvas who are in their last rebirth before Buddhahood.