1 Chronicles 20:2

And David took the crown of their king from off his head, and found it to weigh a talent of gold, and there were precious stones in it; and it was set upon David’s head: and he brought also exceeding much spoil out of the city.

Cross-references

1 Chronicles 18:11 mentions spoil dedicated from Ammonites; here David takes spoil from Rabbah, suggesting a consistent practice of dedicating such spoils.

2 Samuel 12:30 gives an identical account of David taking the Ammonite crown and spoil — a direct parallel narrative of the same event.