b.bodhi has
“Good, good, bhikkhus! Those great disciples spoke rightly when they said that I have called noise a thorn to the jhānas.
(which looks plural to me)
‘sadda-kaṇṭakā kho pana jhānā’
DPR conjugation chart show jhānā as a-declension, singular ablative as the only option.
Ven. Bodhi has it as plural. So my question really is, did the Buddha mean to say first jhana is the only jhana for which noise is a thorn, or all four jhanas?
What’s conspicuously absent from the 10 thorns are the 4 formless attainments, and note the 9th attainment IS present. I’m inclined to think all four jhanas are included as “thorn-able”.
10 thorns
“dasay-ime, bhikkhave, kaṇṭakā.
“[There are] ten-(of)-these, *********, thorns.
katame dasa?
Which ten?
(1) pa-vivek-ārāmassa
(1) (for one who) enjoys-seclusion,
saṅgaṇik-ārāmatā kaṇṭako,
enjoyment-of-society (is a) thorn,
(2) a-subha-nimitt-ānu-yogaṃ
(2) (in the) {pursuit-of}-(the)-un-attractive-sign;
anu-yuttassa
(for the) pursuer,
subha-nimitt-ānu-yogo kaṇṭako,
{pursuit-of}-(the)-attractive-sign (is a) thorn,
(3) indriyesu
(3) (the) sense-faculties;
gutta-dvārassa
(for one) guarding-(the)-doors [of that],
visūka-dassanaṃ kaṇṭako,
{viewing an}-unsuitable-show (is a) thorn,
(4) brahma-cariyassa
(4) (for the) celibate-life,
mātugām-ūpacāro kaṇṭako,
association-with-women (is a) thorn,
(5) paṭhamassa jhānassa
(5) (for the) first jhāna,
saddo kaṇṭako,
noise (is a) thorn,
(6) dutiyassa jhānassa
(6) (for the) second jhāna,
vitakka-vicārā kaṇṭakā,
thought and evaluation (is a) thorn,
(7) tatiyassa jhānassa
(7) (for the) third jhāna,
pīti kaṇṭako,
Rapture (is a) thorn,
(8) catutthassa jhānassa
(8) (for the) fourth jhāna,
assāsa-passāso kaṇṭako,
In-(and)-out breathing (is a) thorn,
(9) saññā-vedayita-nirodha-samāpattiyā
(9) (for) perception-(and)-feelings’-cessation-attainment,
saññā ca vedanā ca kaṇṭako
perception and feeling (is a) thorn,
(10) rāgo kaṇṭako
(10) Lust (is a) thorn,
doso kaṇṭako
hatred (is a) thorn,
moho kaṇṭako.
delusion (is a) thorn.