Quotes from The Jewel-Heap Sutra, Vol. 4
(Mahāratnakūṭa Sūtra)
"The notion of signlessness refers to the absence of a body and its designation, the absence of words and letters, and the absence of appearances and manifestations."
《大寶積經》 卷 4
「言無相者，所謂無身及身施設，無名無句亦無示現。」