I have been reading up on lay followers in the EBTs and I naturally found a strong emphasis on keeping the 5 precepts and faith/confidence in the Triple Gem and encouragement in meditation. I’ve found only two examples so far of practice deeper than this foundation. There are two examples of deepening practice I’ve found so far:
Gavesī (AN 5.180) who had confidence in Buddha Kassapa, and then undertook the 5 Precepts, then the celibacy, and then not eating after noon, and then ordaining as a monk.
Ghaṭīkāra (MN 81) In Buddha Kassapa’s mentions that he undertook the Triple Gem, and the 5 Precepts. It goes on repeat those factors and add that Ghaṭīkāra understood the 4 Noble Truths, ate one time a day, and was celibate. It then adds that he doesn’t take money, gold, or gems, and then adds that he doesn’t dig into the earth.
The growth makes sense to me in that you gain confidence in the Triple Gem, you decide to deepen your practice with the 5 Precepts, but then the next factor for lay people is only two additional qualities eating at the right time and celibacy. I don’t know of any other suttas that show a deepening training beyond the 5 Precepts unless you get to the practice of Uposatha vows during sabbath days like in the Dhammika Sutta where the 8 Precepts are: celibacy, eating at the right time, not wearing perfume, and sleeping on a mat.
The Dhammika Sutta is definitely special to the Uposatha Days, and the Gavesī and Ghaṭīkāra Suttas appear to show that these two followers didn’t habitually sleep on a mat or not wear perfume. Is it assumed in the sutta that they slept on a mat and avoided perfume? Do the 8 Precepts show up in other places besides the Uposatha Vagga and Dhammika Sutta where it only encourages their use during the Uposatha days?