維摩經略疏垂裕記 4.81

4.81

二、身密，二：初、標。「無言之化」者，見身獲益，不假言宣，故云無言。

Second, the secret of the body, in two parts: first, heading. Regarding "wordless transformation," seeing his body brings benefit without relying on verbal proclamation, hence called wordless.