And it is written (Jeremiah 9:11-12) "Who is the wise man who will understand this, and to whom the mouth of the L-rd has spoken and who can tell it? Why was the land lost and parched like a desert without a passerby? And the L-rd said: 'Because they forsook My Torah which I placed before them, and they did not keep My voice nor follow it.'"
And it is written (Amos 2:4) "Thus said the L-rd: 'For three offenses of Judah (I looked away), but for the fourth I will not pardon them — for their despising the Torah of the L-rd, and for not observing His statutes.'"