俱舍論頌疏論本 28.3

28.3

就明諸定中分為四段：一明四靜慮、二明四無色定、三明八等至、四明諸等持。

Under explaining the various absorptions, it is divided into four sections: first, explaining the four dhyānas; second, explaining the four formless absorptions; third, explaining the eight meditative attainments (samāpatti); fourth, explaining the various concentrations (samādhi).