The search for "stumble" delivered 2 verses in 2 songs on 2 records.
The dragon searched for the following: "stumble" as keywords
Here are the matching verses:
Dio: Holy Diver
5. Don't Talk To Strangers
Don't dance in darkness
You may stumble and you're sure to fall
Don't write in starlight
'Cause the words may come out real
Dio: Killing The Dragon
9. Before The Fall
And somewhere down the line
They'll say that his is mine
And all that's left is time
Time to fall and stumble, ah