TIPITAKA Volume 35 : PALI ROMAN Abhidhamma Pitaka Vol 2 : Abhi. Vibhaṅgo

[710] Cattāri jhānāni paṭhamaṃ jhānaṃ dutiyaṃ jhānaṃ tatiyaṃ jhānaṃ catutthaṃ jhānaṃ.