According to Bob Spitz, author of The Beatles: The Biography, it was Bob Dylan who first introduced the Fab Four to marijuana.
Rollin Thunder Review
Bob Dylan in woodstock
▶ Bob Dyland & The Band - "Orange Juice Blues (Blues For Breakfast)" [From LP 'The Basement' 1967]
Bob Dyland Pop Art album cover painting | by Howie Green
blankemon: “Keith Richards, Bob Dylan & Jack Nicholson at Live Aid, 1985 ”
Bob Dylan On The Color Barrier in Music