肇論新疏 3.57

3.57

斯皆者，通指上三，唯證相應，所以口皆默也。非謂釋迦、淨名無樂說之辯，但有辯而不能說也。

'In all these cases' refers comprehensively to the three above: only realization corresponds [to it], which is why their mouths were all silent. It does not mean that Śākya and Vimalakīrti lacked the eloquence of delightful speech, but only that they possessed eloquence yet could not speak of it.