觀無量壽佛經疏 3.109

3.109

八、從復當更作一大蓮華下，至坐右華座已來，正明成上三身觀，生後多身觀。欲觀此二菩薩者，一如觀佛法也。

Eighth, from "Further, one should make another great lotus flower" down to "seated on the right lotus throne," it properly explains that this completes the contemplation of the three bodies above and gives rise to the subsequent contemplation of multiple bodies. Those who wish to contemplate these two bodhisattvas should do so just as in the method for contemplating the Buddha.