Leviticus 26:3–4 & Deuteronomy 4:6

Leviticus 26:3–4 

3 “If you walk in my statutes and observe my commandments and do them, 4 then I will give you your rains in their season, and the land shall yield its increase, and the trees of the field shall yield their fruit. 

Deuteronomy 4:6 

Keep them and do them, for that will be your wisdom and your understanding in the sight of the peoples, who, when they hear all these statutes, will say, ‘Surely this great nation is a wise and understanding people.’