Anupubbīkathā is an over long sutta

Ugga-richman, lay, said in Sutta. Aṅ. (4): aṭṭhaka-nipātā:

With confident heart I paid homage to the Buddha. The Buddha taught me step by step (anupubbikakathā), 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 he knew that my 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 me: ‘Everything(suffering) which is arise by the origins(samudaya), has an end.’ I saw, attained, understood, and fathomed the Dhamma. I went beyond doubt, got rid of indecision, and became self-assured and independent of others regarding the Teacher’s instructions. Right there I went for refuge to the Buddha, his teaching, and the Saṅgha. And I undertook the five training rules with celibacy as the fifth. This is the second incredible and amazing quality found in me.

After listened anupubbīkathā, some listener can enlighten "dhammacakkhuṃ", i.e. from DN Sāmaññaphalasuttaṃ:

So King Ajatasattu, delighting and rejoicing in the Blessed One's words, rose from his seat, bowed down to him, and — after circumambulating him — left. Not long after King Ajatasattu had left, the Blessed One addressed the monks: "The king is wounded, monks. The king is incapacitated. Had he not killed his father — that righteous man, that righteous king — the dustless, stainless Dhamma eye would have arisen to him as he sat in this very seat."

You can search more result by yourself with word "dhammacakkhu", "anupubbika" and "anupuppīka".

There are many place like that in tipitaka, so Buddha exactly taught four noble truth to the lay. The required questions are:

1. What is anupubbīkathā?
2. Why Buddha often taught anupubbīkathā to a lay?
3. Why the first saṅgāyanā monks have to separate anupubbīkathā as may partitions?
4. Why some people think Buddha never taught meditation to a lay?

1. What is anupubbīkathā?

1. Anupubbīkatha, in pāli canons, is the sequence teaching, story, or history. See, each searching results from tipitaka and atthakathā.

2. Anupubbīkathā, in tipitaka context, the single time teaching of entire instructional sequence. It is the very long sutta which describing about buddhist practitioner's procedure, such as single time teaching of KN Khu Nidhikaṇḍaṃ (with some commentary) + AN Uposathasuttaṃ (with some commentary) + DN Sāmaññaphalasuttaṃ (with some commentary). You can see that is over long to orally recite.

2. Why Buddha often taught anupubbīkathā to lay?

Buddha taught anupubbikathā to everyone, not only lay, because every practitioner must practice step by step. No one can practice without sequence like a fog. See, MN Majjhimapaṇṇāsaka Kīṭāgirisutta Number 238.

However for a newbie lay who is genius, buddha taught him from the beginning step to the end in single time, such as single time teaching of KN Khu Nidhikaṇḍaṃ (with some commentary) + AN Uposathasuttaṃ (with some commentary) + DN Sāmaññaphalasuttaṃ (with some commentary).

You can see that is over long to orally recite.

That's why we can't find the single sutta of anupubbīkathā, in tipitaka context, or even in atthakathā as well. So, in atthakathā comment of anupubbīkathā:

Anupubbīkathā is sequence of teaching and commentary of dāna subjects then sīla subjects then heaven subjects then practitioner's procedure.

But the buddha&teacher taught a shorter and more complex sutta to the insider lay man&lay woman, upāsaka and upāsikā, because they have enough ability and knowledge to learn the higher level, e.g. AN Dānasutta. You can see that sutta is shorter and more complex, included only charity and the Path. It is anupubbīkathā, but it is not the meaning of "anupubbīkathā" word in the context like Sutta. Aṅ. (4): aṭṭhaka-nipātā.

3. Why the first saṅgāyanā monks have to separate anupubbīkathā as may partitions?

The first saṅgāyanā monks chose "anupubbikathā" words to avoid the over long of sutta. Because most of lay at that time don't have much knowledge for an enlightenment, buddha have to taught them very long sutta (maybe more that DN) and mix many contents to let them enlighten as sotāpanna, or trust to dhamma. So, if the first saṅgāyanā monks didn't separate it to be many smaller sutta, it will be over long and unable to orally reciting study.

The evidence from netti vicayahārasampāta:

587. Herein, the Lord Buddha advises one of keen faculties with advice in brief; the Lord Buddha advises one of medium faculties with advice in brief and detail; the Lord Buddha advises one of blunt faculties with advice in detail.

4. Why some people think Buddha never taught meditation to a lay?

Because they are misunderstanding of anupubbikathā. And they don't know how to read teaching as four noble truth, because they never memorize netti, or never attained any professional knowledge, ñāṇa, from tipitaka-memorizer&jhānalābhī school, such as Pa-Auk.

Every noble one must enlightened four noble truth, but it is not every ordinary people can discover the noble truth from tipitaka. People who can understand the noble truth from tipitaka must can deconflict every uncleared word of tipitaka. This is unable for people who can't memorize tipitaka pali and netti, because it needs nirutti-paṭisambhidā to deconflict the whole tipitaka.

For the example from VN Mahāvagga by assachi arahanta to sāriputta, who enlightened as sotāpanna:

Ye dhammā hetupabhavā (dukkha) tesaṃ hetuṃ (samudaya) tathāgato āha
tesañca yo nirodho (nirodha&magga) evaṃvādī mahāsamaṇo.

‘Those things(suffering) which proceed from a cause, of these the Truthfinder has told the cause(origin), And that which is their stopping (cessation&path)— the great recluse has such a doctrine.’”

Or in Sāmaññaphalasuttaṃ, which king Ajātasattu almost enlightened as sotāpanna, it is included vipassanāñaṇa part (brief dukkha), pubbenivāsānussatiñāṇa+cutūpapātañāṇa (extended dukkha), āsavakkhayañāṇa (samudaya+nirodha), and all practitioner's procedures in this sutta are magga.

All above is the example of how to read the noble truth in tipitaka.