Leviticus 26:28

Then I will walk contrary to you also in fury
As in ( Leviticus 26:24 ) ; with this addition, in fury; being greatly provoked, and highly incensed, that no regard was had to him, neither to his commands, nor to his corrections; and therefore would be determined to stir up his wrath, and pour out the fury of his indignation on them, which must be terrible; and I, even I, will chastise you seven times for your sins;
add new and many more chastisements, and that in hot displeasure, for their sins; and the repetition or doubling of the phrase, "I, even I, will do it", denotes the certainty of it, and that he will do it himself, and his hand should be visible in it; and they should feel the weight of it, and be obliged to own that these were punishments inflicted by him for their sins.