e, empty dwellings. Practice jhṅna, ṅnanda. Donât be heedless. Donât later fall into remorse. That is our message to you all." That is what the Blessed One said. Gratified, Ven. ṅnanda delighted in the Blessed Oneâs words. Note 1. According to the commentaries, "imperturbable" denotes the fourth jhṅna and the four formless attainments. MN 66 provides partial support for this interpretation, saying that the first three jhṅnas are perturbable while the fourth is not, but this sutta does not include the dimension of nothingness under the term—or, apparently, any of the formless attainments higher than that. See also: MN 66; MN 102; MN 121; MN 140; SN 22:55; Ud 3:3; Sn 5:14 - --> - - - -