Heap
Heap (tel in Hebrew) referred to a mound of ruins — a destroyed city reduced to rubble and left as a permanent monument to judgment. When Joshua burned Ai, he reduced it to a heap of ruins forever (Joshua 8:28), and Jeremiah later used the same term (tel) as a figure for irreversible judgment: "And I will make Jerusalem heaps" (Jeremiah 9:11; 26:18; Micah 3:12). The Palestinian landscape was dotted with such tells — mounds formed by successive layers of occupation and destruction — and the biblical writers were well aware of their meaning as testament to the fate of cities that fell before conquering armies or divine judgment.
Heaps of stones also marked covenants and boundaries: the heap of witness between Jacob and Laban (Genesis 31:46–52, called Galeed in Hebrew and Jegar-sahadutha in Aramaic) was a memorial cairn. Stones heaped over the bodies of Achan (Joshua 7:26) and Absalom (2 Samuel 18:17) marked sites of judgment. Proverbs 25:22 and Romans 12:20 use the image of heaping coals of fire on an enemy's head as a picture of overcoming evil with good.