Matthew Poole and continuators on Leviticus 26:4

4 Then I will give you rain in due season, and the land shall yield her increase, and the t[illegible: 1+ letters]es of the field shall yield their fruit.

Therefore God placed them not in a land where there were such rivers as Nilus, to water it and make it fruitful, but in a land which depended wholly upon the rain of heaven, the key whereof God kept in his own hand, that so he might the more effectually oblige them to obedience, in which their happiness consisted.