Because ye would not be obedient. — In return for your disobedience. The same word is employed in Deuteronomy 7:12. The use of the word in these two places might fairly be taken to mark off the intervening portion as a complete section of the discourse.
Related Commentaries of Deuteronomy 8:20
Deuteronomy 8:20
20 As the nations which the LORD destroyeth before your face, so shall ye perish; because ye would not be obedient unto the voice of the LORD your God.