Josh 7:12

וְלֹ֨א יֻכְל֜וּ בְּנֵ֣י יִשְׂרָאֵ֗ל לָקוּם֙ לִפְנֵ֣י אֹיְבֵיהֶ֔ם עֹ֗רֶף יִפְנוּ֙ לִפְנֵ֣י אֹֽיְבֵיהֶ֔ם כִּ֥י הָי֖וּ לְחֵ֑רֶם לֹ֤א אוֹסִיף֙ לִֽהְי֣וֹת עִמָּכֶ֔ם אִם־לֹ֥א תַשְׁמִ֛ידוּ הַחֵ֖רֶם מִֽקִּרְבְּכֶֽם׃

This is why the Israelites cannot stand against their enemies. They will turn their backs and run from their enemies, because they themselves have been set apart for destruction. I will no longer be with you unless you remove from among you whatever is devoted to destruction.