The Vimuttimagga (Path to liberation, 解脫道論) is an early meditation manual by the arahant Upatissa preserved only in a sixth century Chinese translation.
A similar presentation of these stages can be found in the Patisambhidamagga (dated between the 3rd century BC to 2nd century AC), an Abhidhamma work included in the fifth Nikāya of the Pāli Canon.