Defeat at Ai

But the children of Israel committed a trespass regarding the accursed things, for Achan the son of Carmi, the son of Zabdi, the son of Zerah, of the tribe of Judah, took of the accursed things; so the anger of the Lord burned against the children of Israel.

Then they raised over him a great heap of stones, still there to this day. So the Lord turned from the fierceness of His anger. Therefore the name of that place has been called the Valley of Achor to this day.

When you have transgressed the covenant of the Lord your God, which He commanded you, and have gone and served other gods, and bowed down to them, then the anger of the Lord will burn against you, and you shall perish quickly from the good land which He has given you.”