三彌勒經疏 1.209

1.209

經曰「爾時轉輪王」以下，第四出主也。四種兵者，一車、二牛、三象、四馬也。寶臺千頭者，千子所遊處故。形如蓮華者，寶藏涌地貌也。

From the sūtra's words, "At that time the wheel-turning king..." onward is the fourth, presenting the ruler. The fourfold army consists of: 1. chariots, 2. oxen, 3. elephants, and 4. cavalry. The jeweled terrace having a thousand tiers is because it is where the thousand sons disport. "Shaped like a lotus flower" describes the appearance of the jeweled treasury surging forth from the earth.