Definition 1 of 2
Dadaji: "Try with the other channel, beta. Koshish karte raho, sabar ka phal meetha hota hai."
Ramu (aside to younger sister): "I don't need advice but help. I'm going out to the corner shop."
Younger sister (whispering): Careful, dad's about to return home. He may see you smoking."
Definition 2 of 2
It basically means: have patience and you will be rewarded :)
When someones says: 'I can't wait any longer.'
You can reply with: 'Sabar ka phal meetha hota hai.'