Because he killed innocent people and stained Jerusalem with their blood, the LORD was unwilling to forgive them.
TSK
TSK · Lamentations 3:42
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“Nonetheless they grew disobedient and rebelled against you; they disregarded your law. They killed your prophets who had solemnly admonished them in order to cause them to return to you. They committed atrocious blasphemies.
However, you must confess that you have done wrong, and that you have rebelled against the LORD your God. You must confess that you have given yourself to foreign gods under every green tree, and have not obeyed my commands,’ says the LORD.
צ(Tsade)Jerusalem Speaks: The LORD is right to judge me! Yes, I rebelled against his commands. Please listen, all you nations, and look at my suffering! My young women and men have gone into exile.
You mix uncleanness with obscene conduct. I tried to cleanse you, but you are not clean. You will not be cleansed from your uncleanness until I have exhausted my anger on you.
O LORD, we have been humiliated– our kings, our leaders, and our ancestors– because we have sinned against you.
“As for your ancestors, where are they? And did the prophets live forever?
I will get up and go to my father and say to him,“Father, I have sinned against heaven and against you.