How to you pass a drug test?

I recently stopped smoking pot and need to know how to get it out of my system quick so i can pass a drug test for a job. How can I get it out of my system isnt there things i can drink and stuff ???
Update: i recently stopped smoking pot like two weekes ago and i was a big smoker and how do i pass a urine test for a job ? and when do i start doing theses things and how long do i do them for?
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