Ozzy Osbourne has received some bad news.

Ozzy Osbourne announced on Twitter on Wednesday that his No More Tours II tour would have to be canceled.

“This is perhaps one of the hardest things I’ve ever had to communicate with my dedicated fans,” the 74-year-old said before going into detail about his health and decision to retire from the stage.

“As you may be aware, I had a serious accident four years ago in which I fractured my spine. All this time, my only goal has been to return to the stage. My vocal range is fantastic. Despite three operations, stem cell therapies, countless physical therapy sessions, and, most recently, the ground-breaking Cybernetics (HAL) treatment, my body is still weak physically,” the musician wrote.