Well, there are quite a few passages in the suttas such as the following from MN91 where someone becomes a stream-enterer while listening to teachings from the Buddha:
When he said this, Brahmāyu got up from his seat and arranged his robe on one shoulder. He bowed with his head to the Buddha’s feet, caressing them and covering them with kisses, and pronounced his name: “I am the brahmin Brahmāyu, Master Gotama! I am the brahmin Brahmāyu!”
Then that assembly, their minds full of wonder and amazement, thought, “It’s incredible, it’s amazing, that Brahmāyu, who is so well-known and famous, should show the Buddha such utmost devotion.” Then the Buddha said to Brahmāyu, “Enough, brahmin. Get up, and sit in your own seat, since your mind has such confidence in me.” So Brahmāyu got up and sat in his own seat.
Then the Buddha taught him step by step, with a talk on giving, ethical conduct, and heaven. He explained the drawbacks of sensual pleasures, so sordid and corrupt, and the benefit of renunciation. And when the Buddha knew that Brahmāyu’s mind was ready, pliable, rid of hindrances, joyful, and confident he explained the special teaching of the Buddhas: suffering, its origin, its cessation, and the path. Just as a clean cloth rid of stains would properly absorb dye, in that very seat the stainless, immaculate vision of the Dhamma arose in the brahmin Brahmāyu: “Everything that has a beginning has an end.”
Then Brahmāyu saw, attained, understood, and fathomed the Dhamma. He went beyond doubt, got rid of indecision, and became self-assured and independent of others regarding the Teacher’s instructions.
He said to the Buddha:
“Excellent, Master Gotama! Excellent! As if he were righting the overturned, or revealing the hidden, or pointing out the path to the lost, or lighting a lamp in the dark so people with good eyes can see what’s there, Master Gotama has made the teaching clear in many ways. I go for refuge to Master Gotama, to the teaching, and to the mendicant Saṅgha.
It sounds like the Buddha brings Brahmāyu’s mind, while explaining the gradual training, to a state free of hindrances (joyful too to give at least a token nod to the subject of the OP ). Then the Buddha explains the four noble truths. It’s arguable that perhaps Brahmāyu spontaneously briefly enters jhana during or after the noble truths have been explained. I’m not sure that this is a given, maybe it’s also a type of samadhi that’s not quite at the jhana level (it has been a while since I read Analayo’s writings on this point, but IIRC the definition of samma samadhi as the four jhanas only occurs in a handful of places the Pali canon and not at all in the Agamas, except perhaps for one parallel; my memory is a bit fuzzy on this point). However, on MN91, it does sound like Brahmāyu is free of hindrances prior to hearing the explanation of the four noble truths. Obviously, he cannot be in jhana at that point (well, unless one’s understanding of jhana allows one to be listening to a discourse at the time). This type of passage pops in several places, e.g., for Suppabuddha the Leper in Ud5.3.