[736] Therein, which is the first jhāna?
Here a bhikkhu, on whatever occasion he develops form-sphere (rūpāvacara) jhāna that is functional (kiriya) — neither wholesome nor unwholesome and not a kamma-result (kammavipāka) — a pleasant abiding in the present life (diṭṭhadhammasukhavihāra): quite secluded from sensual pleasures … he enters and dwells in the first jhāna [on] the earth kasiṇa (paṭhavīkasiṇa) — on that occasion there is five-factored jhāna: thought-conception (vitakka), discursive thought (vicāra), rapture (pīti), pleasure (sukha), and one-pointedness of mind (cittassa ekaggatā). This is called the first jhāna. The remaining phenomena (dhammā) are associated with the jhāna (jhānasampayutta).
Therein, which is the second jhāna?
Here a bhikkhu, on whatever occasion he develops form-sphere jhāna that is functional — neither wholesome nor unwholesome and not a kamma-result — a pleasant abiding in the present life: with the stilling of thought-conception and discursive thought … the second jhāna … the third jhāna … the fourth jhāna … the first jhāna … he enters and dwells in the fifth jhāna [on] the earth kasiṇa — on that occasion there is two-factored jhāna: equanimity (upekkhā) and one-pointedness of mind. This is called the fifth jhāna. The remaining phenomena are associated with the jhāna. …
Here a bhikkhu, on whatever occasion he develops formless-sphere (arūpāvacara) jhāna that is functional — neither wholesome nor unwholesome and not a kamma-result — a pleasant abiding in the present life: having completely transcended the sphere of nothingness (ākiñcaññāyatana), accompanied by the perception (saññā) of the sphere of neither-perception-nor-non-perception (nevasaññānāsaññāyatana), with the abandoning of pleasure … he enters and dwells in the fourth jhāna — on that occasion there is two-factored jhāna: equanimity and one-pointedness of mind. This is called the fourth jhāna. The remaining phenomena are associated with the jhāna.
The Analysis according to Abhidhamma (Abhidhammabhājanīya).
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.