注維摩詰經 2.196

2.196

肇曰：禪，四禪。定，四空定。解脫，八解脫。三昧，三三昧。此皆禪度之別行也。

[Seng]zhao says: 'Dhyāna' refers to the four dhyānas. 'Concentration' refers to the four formless concentrations. 'Liberation' refers to the eight liberations. 'Samādhi' refers to the three samādhis. These are all distinct practices of the pāramitā of dhyāna.