That which is gone out of your lips you shall keep and perform; even a freewill offering, according as you have vowed to the LORD your God, which you have promised with your mouth.
When you come into the standing corn of your neighbor, then you may pluck the ears with your hand; but you shall not move a sickle to your neighbor's standing corn.
And the children of Israel smote them not, because the princes of the congregation had sworn to them by the LORD God of Israel. And all the congregation murmured against the princes.