Friends Season 6 Episode 23 : The One With The Ring
Chandler and Phoebe go looking for an engagement ring, and Chandler finds the perfect one but does not have the money on him to purchase it. When he gets his hands on the cash and returns to the store, he is dismayed to find Phoebe allowed the ring to be sold and tries to track it down. Meanwhile Rachel attempts to get Paul to open up emotionally but does too good a job when Paul starts crying and won't stop. Joey and Ross are upset that it appears that Chandler prefers to spend time with Phoebe and decide to close Chandler out.