Kuber, the god of wealth, was a haughty man. One day, he went to Kailash to invite Lord Shiva and Parvati to come to his place and have dinner, while in actuality he just wanted to show off his riches to them. However, Lord Shiva had other engagements, so he asked Kuber to take Ganesha with him as he was fond of eating. But he asked hesitatingly if Kuber would be able to feed him properly. Kuber, thinking how much could a kid actually eat, agreed to take Ganesha with him.
Now was Kuber's real test. Ganesha finished every food item in the house and asked for more! When Kuber requested that he wasn't left with any more food, Ganesha threatened to eat his host! Panicked, Kuber rushed to Kailash begging Shiva and Parvati to tell him a way to satiate Ganesha's hunger. Parvati smiled and gave Ganesha a tulsi-leave that calmed him down and Kuber had, well, learnt his lesson!