I've tried to find the lyrics to this song for years. I'll give some of it as I remember:

When I was young, I used to ride an old black horse to school.
Over seven hills I had to ride to learn that Golden Rule.
When school was out in the evening time, just about half-past four,
I'd saddle up that old black horse and ride those hills once more.

CHORUS: Seven hills to home, Seven hills to home....