Day 10 concludes Chapter 6, Assurance of Future Buddhahood, and opens Chapter 7, The Parable of a Magic City.

One after another, Subhuti, Great Katyayana and Great Maudgalyayana each receive assurances from Sakyamuni that they will become Buddhas in their future lives. Then he adds a blanket assurance:

The five hundred disciples of mine
Are powerful and virtuous.
They also shall be assured
Of their future Buddhahood.
They will become Buddhas
In their future lives.

The chapter ends by dangling this tidbit:

Now I will tell you
About my previous existence
And also about yours.
All of you, listen attentively!

Chapter 7, The Parable of the Magic City, opens with a description of infinity. It goes like this in gathas:

According to my remembrance,
There lived a Buddha, an Honorable Biped,
Called Great-Universal-Wisdom-Excellence,
Countless kalpas ago.

Suppose someone smashed
All the earth-particles
Of one thousand million Sumeru-worlds
Into ink-powder.

He went, [carrying the ink-powder with him,]
And inked a dot as large as a particle of dust
On the world at a distance of one thousand worlds.
He repeated the inking until the ink-powder was exhausted.

Suppose the worlds
Through which he went,
Whether they were inked or not,
Were smashed into dust.

It is innumerable kalpas,
More than the number
Of the particles of dust thus produced,
Since that Buddha passed away.

But perhaps just as important:

I remember the extinction of that Buddha
As vividly as if he had passed away just now,
By my unhindered wisdom; I also remember
The Sravakas and Bodhisattvas who lived [with him].

Bhiksus, know this!
My wisdom is pure, wonderful,
Free from asravas and from hindrance.
I know those who lived innumerable kalpas ago.

The story of Great-Universal-Wisdom-Excellence’s enlightenment underscores the role played by gods, Brahman-heavenly-kings play and the four heavenly-kings play:

[Before he attained Buddhahood,] he sat at the place of enlightenment and defeated the army of Mara. He wished to attain Anuttara-samyak-sambodhi, but could not because the Dharma of the Buddhas had not yet come into his mind. He sat cross-legged without moving his mind and body for one to ten small kalpas. During all that time the Dharma of the Buddhas did not come into his mind.

[Before he sat at the place of enlightenment,] the Trayastrimsa Gods prepared him a lion-like seat a yojana high under the Bodhitree so that he might be able to attain Anuttara-samyak-sambodhi on that seat. When he sat on that seat, the Brahman-heavenly-kings rained heavenly flowers on the area extending a hundred yojanas in all directions from that seat. From time to time withered flowers were blown away by fragrant winds and new flowers were rained down. [The Brahman-heavenly-kings] continued this offering to him for fully ten small kalpas. [After he attained Buddhahood also,] they continued raining flowers until he passed away.

[When he sat on that seat,] the four heavenly-kings beat heavenly drums, and the other gods made heavenly music and offered it to him. They continued these offerings also for fully ten small kalpas. [After he attained Buddhahood also,] they continued these offerings until he passed away.

Before Great-Universal-Wisdom-Excellence left home, he had 16 sons. These sons act as a Greek chorus, urging the Buddha to turn the wheel of the Dharma:

You, the Hero of the World, are unequalled.
Adorned with the marks
Of one hundred merits,
You have obtained unsurpassed wisdom.
Expound the Dharma and save us
And other living beings of the world!

Expound the Dharma, reveal the Dharma,
And cause us to obtain that wisdom!
If we attain Buddhahood,
Others also will do the same.

You, the World-Honored One, know
What all living beings have deep in their minds,
What teachings they are practicing,
And how much power of wisdom they have.

You know their desires, the merits they obtained,
And the karmas they did
In their previous existence.
Turn the wheel of the unsurpassed Dharma!