The search for "mercy" delivered 1 verse in 1 song on 1 record.
The dragon searched for the following: "mercy" as keywords
Here are the matching verses:
Black Sabbath: Live Evil
7. War Pigs
Now In Darkness World Stops Turning
Asshes Where The Bodies Burning
No More War Pigs Have The Power
And As God Has Struck The Hour
Day Of Judgement God Is Calling
On Their Knees The War Pigs Crawling
Begging Mercies For Their Sins
Satan Laughing Spreads His Wings
Oh Lord Yeah