Celtic boss furious with 'insipid' players after Motherwell loss
"I'm raging, bitterly disappointed," he said.
"And I can't accept it. The front-line in the first-half - apart that is from James Forrest - was insipid. People keep coming to me saying they want to play. Tonight they got the opportunity and did not play.
"Some of them need to take a good look at themselves and maybe I do as well. Maybe I made too many changes.
"If some of them think the league is won they won't play here again.
"They can go and find another club and I will play the kids because I'm pretty angry with some of the performances.
"If I detect they are wasting any game at Celtic - and it was apparent in some cases - it gives me a lot to think about.
"You earn the right to play and some players did not do that for us tonight."