When Pavarotti finished singing the aria from Rigoletto, he got a very big hand.
bird in the hand is worth two in the bush
Something we have, or can easily get, is more valuable than something we want that we may not be able to get; we shouldn't risk losing something sure by trying to get something that is not sure. A proverb.
Johnny has a job as a paperboy, but he wants a job in a gas station. His father says that a bird in the hand is worth two in the bush.
bite the hand that feeds one
To turn against or hurt a helper or supporter; repay kindness with wrong.
He bit the hand that fed him when he complained against his employer.