So he cried out to Adonai, and Adonai showed him a tree. When he threw it into the waters, they were made sweet. There He made a statute and an ordinance for them, and there He tested them.
You are to remember all the way that Adonai your God has led you these 40 years in the wilderness—in order to humble you, to test you, to know what was in your heart, whether you would keep His mitzvot or not.