Day 9 covers Chapter 5, The Simile of Herbs, and introduces Chapter 6, Assurance of Future Buddhahood.

After the Burning House – we don’t know we’re in danger – and the Rich Man and his Son – we think we don’t deserve the riches of our father – the Simile of Herbs helps explain why the same dharma …

Kāśyapa, know this! I, the Tathāgata, am the King of the Dharma. Nothing I say is false. I expound all teachings with expedients by my wisdom in order to lead all living beings to the stage of knowing all things. I know what region a living being will be taken to by what teaching, and what a living being has deep in his mind. I am not hindered by anything in knowing all this. I know all things clearly, and show my knowledge of all things to all living beings.

… produces different fruit in each person:

Kāśyapa! Suppose the various trees and grasses of the one thousand million Sumeru-worlds including herbs growing in the thickets, forests, mountains, ravines and valleys, on the ground, and by the rivers, all these plants being different in names and forms, were covered with a dark cloud, and then watered by a rainfall at the same time. The small, middle and large roots, stems, branches and leaves of the trees and grasses including herbs growing in the thickets and forests were watered. So were the tall and short trees, whether they were superior or middle or inferior. Those plants were given more or less water by the same rain from the same cloud, and grew differently according to their species. They obtained different flowers and fruits although they grew on the same ground and received water from the same rain.

And again:

The various teachings I expound are of the same content, of the same taste. Those who emancipate themselves [from the bonds of existence,] from illusions, and from birth and death, will finally obtain the knowledge of the equality and differences of all things. But those who hear or keep my teachings or read or recite the sūtras in which my teachings are expounded, or act according to my teachings, do not know the merits that they will be able to obtain by these practices. Why is that? It is because only I know their capacities, appearances, entities and natures. Only I know what teachings they have in memory, what teachings they have in mind, what teachings they practice, how they memorize the teachings, how they think of the teachings, how they practice the teachings, for what purpose they memorize the teachings, for what purpose they think of the teachings, for what purpose they practice the teachings, and for what purpose they keep what teachings. Only I see clearly and without hindrance that they are at various stages [of enlightenment]. I know this, but they do not know just as the trees and grasses including herbs in the thickets and forests do not know whether they are superior or middle or inferior.

And in gāthās:

I now expediently reveal the Dharma with this simile.
I expound one truth with various discourses.
This simile is only one of the expedients
Employed by my wisdom,
Just as a drop of sea water is
Part of the great ocean.

Though I water all living beings of the world
With the same rain of the Dharma,
They practice the teachings
Of the same taste differently
According to their capacities,
Just as the herbs and trees
In thickets and forests
Grew gradually according to their species.

The Buddhas always expound
The teachings of the same taste
In order to cause all living beings of the world
To understand the Dharma.
Those who practice the teachings continuously
Will obtain [various fruits of] enlightenment.

The introduction of Chapter 6, Assurance of Future Buddhahood, makes a meal of all this:

Great Hero, World-Honored One!
King of the Dharma of the Śākyas!
Give us your voice
Out of your compassion towards us!

If you see what we have deep in our minds,
And assure us of our future Buddhahood,
We shall feel as cool and as refreshed
As if we were sprinkled with nectar.

Suppose a man came
From a country suffering from famine.
Now he saw the meal of a great king.
He did not partake of it in doubts and fears.
After he was told to take it by the king,
He took it at once.
We are like that man.
We know the defects of the Lesser Vehicle.
But we do not know how to obtain
The unsurpassed wisdom of the Buddha.

Although we hear you say [to us],
“You will become Buddhas,”
We are still in doubts and fears about it,
Just as that man was about the meal.
If you assure us of our future Buddhahood,
We shall be happy and peaceful.

You, the Great Hero, the World-Honored One,
Wish to give peace to all the people of the world.
If you assure us of our future Buddhahood, we shall be
Like the man who was permitted to take the meal.