大般涅槃經義記 4.55

4.55

Below, in explaining that bodhisattvas see relying on the sūtra, 'if kṣatriyas and others sever and eliminate [defilements], they immediately see and achieve the unsurpassed path' explains that bodhisattvas sever delusions and verify vision; bodhisattvas residing in the world do not go beyond the four castes, and therefore it speaks of kṣatriyas, brāhmaṇas, and so forth.