How to refuse a job introduced by a friend

It's better to talk about it before it's too late and tell the boss directly that this job is not suitable for you (you'll know that you can't adapt after working for a few days)

Say something nice to your boss or company.

On my friend's side, I said I didn't want to do such a job, and I couldn't adapt myself. I thank him for his introduction and apologize for quitting.