妙法蓮華經玄贊 7.202

7.202

贊曰：四專為利益。去來坐立，佛三威儀，略無臥也，利樂時故。或去謂示入涅槃，來謂示成正覺，坐謂說法利生，立謂待生機熟；終不疲勞生於厭怠，慈悲深故。

Commentary: Fourth, being dedicated solely to benefiting. Going, coming, sitting, and standing are the Buddha's four postures, of which lying down is omitted here, because this is the time for benefiting and gladdening beings. Alternatively, going refers to manifesting entry into nirvāṇa; coming refers to manifesting the realization of right awakening; sitting refers to preaching the Dharma to benefit beings; and standing refers to awaiting the maturation of beings' capacities; never tiring or giving rise to weariness and laxity, because his compassion is profound.