Who said "I sing because I have to"?

This quote is attributed to Waylon Jennings.

I sing because I have to - Waylon Jennings

"I sing because I have to"

Waylon Jennings

Outlaw Country Singer American 1937–2002

"I ain't living long like this"

"Mommas, don't let your babies grow up to be cowboys"

"Ladies love outlaws"

"You don't have to call me darling, darling"