金剛經纂要刊定記 4.127

4.127

偈云下。引證。具云：分別有為體，防彼成就得，三相異體故，離彼是如來。於中初二句義當前段，後一句當次科，第三一句合當此文，故偏言證。

Regarding "the verse states, etc.": citing substantiation. The full verse says: 'Discriminating the saṃskṛta substance, / to prevent them from attaining realization; / because the three marks have a different substance, / free from them is the Tathāgata.' Among these, the meaning of the first two lines corresponds to the previous section, the last line corresponds to the next heading, and the third line precisely corresponds to this text, which is why it is specifically cited as substantiation.