Day 13 covers all of Chapter 8, The Assurance of Future Buddhahood of the Five Hundred Disciples.
Having last month learned of Pūrṇa’s current practices in gāthās, we learn of his past practices.
Under hundreds of thousands of millions of past Buddhas,
This Pūrṇa practiced strenuously what he should do.
He expounded and protected
The teachings of those Buddhas.
In order to obtain unsurpassed wisdom,
He became the most excellent disciple
Of those Buddhas.
He was learned and wise.
He expounded the Dharma without fear,
And made his listeners rejoice.
He was never tired
Of helping those Buddhas do their work.
He obtained great supernatural powers
And the four kinds of unhindered eloquence.
Seeing who was clever, and who was dull,
He always expounded the Pure Dharma.
He expounded the dharma of the Great Vehicle
To hundreds of thousands of millions of living beings,
And caused them to dwell in the Dharma
So that the worlds of those Buddhas might be purified.