Ma ni Ae!! Nanatsu no Doragon Bōru
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
"Ma Ni Ae!! Nanatsu no Doragonbaru" is a background music track (BGM), produced by Toei Animation and composed by prolific Japanese composer, Shunsuke Kikuchi. The track was created for the soundtrack of the original Japanese Dragon Ball series and played throughout the King Piccolo Saga and the Piccolo Jr. Saga.
The track is confirmed to play during the following scenes: