Quotes from Treatise on the Great Perfection of Wisdom, Vol. 5
(Mahāprajnāpāramitāśāstra)
"The various samādhis denote three samādhis: emptiness (S.śūnyatā), wishlessness (S.apraṇihita) and signlessness (S. ānimitta)."
《大智度論》卷五
「諸三昧」者,三三昧:空、無作、無相。