Kings IV 3:27

27 And he took his eldest son whom he had designed to reign in his stead, and offered him up for a whole-burnt-offering on the walls. And there was a great indignation against Israel; and they departed from him, and returned to their land.

Kings IV 3:27 In-Context

25 And they razed the cities, and cast every man his stone on every good piece and filled it; and they stopped every well, and cut down every good tree, until they left the stones of the wall cast down; and the slingers compassed , and smote it.
26 And the king of Moab saw that the battle prevailed against him; and he took with him seven hundred men that drew sword, to cut through to the king of Edom: and they could not.
27 And he took his eldest son whom he had designed to reign in his stead, and offered him up for a whole-burnt-offering on the walls. And there was a great indignation against Israel; and they departed from him, and returned to their land.

Footnotes 1

The Brenton translation of the Septuagint is in the public domain.