妙法蓮華經玄義 7.62

7.62

Third, the original land: since the original source realized the fruition, it must have a reliant land. Now since the traces reside in the land of shared residence or in the three lands, and the intermediate time also has four lands, the original buddha must also have a land; where then does he dwell? The text says: "Ever since then, I have constantly been in this Sahā world, preaching the Dharma and transforming sentient beings." According to this passage, it is truly not the Sahā of the traces today, nor the place of the provisional traces in the intermediate time, but the Sahā of the original source, which is the subtlety of the original land.