Leviticus 25:16; Leviticus 26:22

16 'In proportion to the extent of the years you shall increase its price, and in proportion to the fewness of the years you shall diminish its price, for it is a number of crops he is selling to you.

22 'I will let loose among you the beasts of the field, which will bereave you of your children and destroy your cattle and reduce your number so that your roads lie deserted.