摩訶止觀 9.117

9.117

又佛威儀者：佛坐道場、轉法輪、入涅槃，皆約十二因緣。《大品》云：「若能深觀十二因緣，即是坐道場。」道場有四：若觀十二因緣生滅究竟，即三藏佛坐道場，木樹、草座；若觀十二因緣即空究竟，通教佛坐道場，七寶樹、天衣座；若觀十二因緣假名究竟，別教舍那佛坐道場，七寶座；若觀十二因緣中究竟，是圓教毘盧遮那佛坐道場，虛空為座。當知大小道場不出十二因緣觀也。

Furthermore, regarding the Buddha's majestic deportment: the Buddha's sitting at the bodhimaṇḍa, turning the Dharma wheel, and entering nirvāṇa are all based on the twelve links of dependent origination. The Larger Prajñāpāramitā states: "If one can deeply contemplate the twelve links of dependent origination, this is sitting at the bodhimaṇḍa." There are four kinds of bodhimaṇḍa: if one contemplates the arising and ceasing of the twelve links of dependent origination to the ultimate, this is the Tripiṭaka Buddha sitting at the bodhimaṇḍa, with a wooden tree and a grass seat; if one contemplates the twelve links of dependent origination as identical to emptiness to the ultimate, this is the shared teaching Buddha sitting at the bodhimaṇḍa, with a tree of seven jewels and a seat of heavenly garments; if one contemplates the provisional designation of the twelve links of dependent origination to the ultimate, this is the distinctive teaching Rocana Buddha sitting at the bodhimaṇḍa, with a seven-jeweled seat; if one contemplates the middle within the twelve links of dependent origination to the ultimate, this is the perfect teaching Vairocana Buddha sitting at the bodhimaṇḍa, with empty space as the seat. One should know that whether great or small, bodhimaṇḍas do not go beyond the contemplation of the twelve links of dependent origination.