If ye walk in my statutes, &c. In reward of their obedience, God promises them temporal prosperity in every instance that could render a nation happy. And, first, he assures them they should have fruitful seasons, here expressed by giving them rain in due time Because, in Canaan and Syria, they were wont to have hardly any rain but at two stated seasons; in the end of autumn, at seed-time; and in spring, before harvest; termed the former and latter rain, Jeremiah 5:24; without which, the year was quite barren. For God did not place his people in a land where there were such rivers as the Nile to water it, and render 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.
Related Commentaries of Leviticus 26:3
Leviticus 26:3-4
3 If ye walk in my statutes, and keep my commandments, and do them;
4 Then I will give you rain in due season, and the land shall yield her increase, and the trees of the field shall yield their fruit.