I heard that we will be given something to clear our bowels before delivery. May I know how is the procedure done actually?

I was given at TMC before C section. They just asked me not to eat or drink for a few hours, then they insert something up my butt, asking me to hold it in as long as i can. I lasted 5 secs only before running to the toilet. They asked me to try to hold it in for 5mins, i find it impossible hahaha!