大般涅槃經義記 3.264

3.264

第三句中，「若言如來捨此苦身入於涅槃」舉滅證苦，「是名」下結。

In the third clause, 'If one says that the Tathāgata abandons this painful body and enters into nirvāṇa' adduces cessation to prove suffering; from 'this is called' downward concludes it.