This takes place during Gohan's training. These are Piccolo's thoughts about Gohan when he's sleeping.

You’re a child of misfortune, Son Gohan,

Like your father and me before you,

Goku and I had innocence,

And now we have none,

You like us you were born to a harsh destiny,

Pain and suffering is woven into our three lives,

To kill or to die,

That is no true choice, we lose both ways…

Either to give up the mortal world with all its pleasures,

Or to have our very hearts torn at until there is nothing left,

And as I look at you I plead,

Please Kami let this boy come out whole,

In body and in soul.