25. the Lord showed him a tree, which when he had cast into the waters, the waters were made sweet—Some travellers have pronounced this to be the Elvah of the Arabs—a shrub in form and flower resembling our hawthorn; others, the berries of the Ghurkhud—a bush found growing around all brackish fountains. But neither of these shrubs are known by the natives to possess such natural virtues. It is far more likely that God miraculously endowed some tree with the property of purifying the bitter water—a tree employed as the medium, but the sweetening was not dependent upon the nature or quality of the tree, but the power of God (compare Joh 9:6). And hence the "statute and ordinance" that followed, which would have been singularly inopportune if no miracle had been wrought.

     8. Take the rod—which had been deposited in the tabernacle (Nu 17:10), the wonder-working rod by which so many miracles had been performed, sometimes called "the rod of God" (Ex 4:20), sometimes Moses' (Nu 20:11) or Aaron's rod (Ex 7:12).