Sekke-ye shans (1970)

Two brothers fall in love with the same girl. Nevertheless, the girl likes the older brother. A guy tries to set these two brothers apart and make the younger one addicted to gambling. He wins everything the father of the girl has in a bet and says that he will give back all of it if he agrees to make his daughter marry him. The father accepts. But the younger brother finds out that you can't buy love, and lets the older brother to have her.