The four jhānas, in Iti Vuttuka (KN Iti) are never explicitly named as such. jhana-meditator appears a few times. In the final four suttas of the Iti Vuttuka, which was a small collection of verse/prose passages memorized by one of the Queen’s lady friends to report back to her a series of talks the Buddha was giving to monks over several days.
One of the things about the EBT is you have to learn some of the terse code phrases and how they correspond to the more fleshed out pericopes we’re more familiar with from later works like MN. Whereas the majjhima nikaya has a much more verbose and detailed gradual training sequence from sila to nirvana (compared to the really early stuff like KN Iti, Udana, Sutta Nipata), with careful study you’ll see how things map.
I’ve added pali/english translations for the last four suttas in the KN Iti so you can see this.
etc…
Iti 109 is basically a commentary on the standard first jhāna formula portion of “vivicceva kamehi… akusalehi dhammehi” (seclusion from sensual pleasures and unskillful dhammas), describing in practical terms what those alluruing and unwholesome states are with a simile.
Iti 110 is a good description of how you train 24/7 and in all four postures to get close to and purify first jhana. The expression “first jhāna” never appears. But comparison with the next sutta, and MN 19 and MN 20 you can map the correspondence and see superman in his clark kent disguise.
Iti 111 shows the training to get from first to fourth jhāna, 24/7 and in all postures.
Iti 112 shows you what you do with the fourth jhāna to penetrate the many elements and attain nirvana.
But in 111 and 112, it doesn’t refer to jhāna by name, you have to recognize the clark kent disguise (ekagga, samadhi, kaya-passadhi, etc…)
People often want to know, how do you get first jhāna. This 4 sutta sequence lets you see it in the whole context of the big picture. What you’re doing moment to moment, is assiduously, ardently performing the 4 duties of right effort and 4sp. Even after you get first jhana, right effort is still working nonstop (MN 78). It’s just that once you get the hang of kaya-passadhi, your right effort becomes easier and gradually more effortless.
When you can do first and second jhana, you may be hit with the realization, “this is actually so damn easy, why didn’t anyone tell me?” Well I’m here to tell you, it’s easy, if you follow the simple instructions in Iti 110 and 111. The actual obstacle is that people don’t make a firm commitment to do that 24/7. And for people who do make that committment, Kāya passaddhi, not enough of it, and too much thinking are usually the things that prevent a solid second jhana experience.