Numbers 22:2

And Balak the son of Zippor saw all that Israel had done to the Amorites.

Cross-references

Numbers 22:4 shows Moab's fearful response to Israel's presence, expanding on Balak's observation with the simile of an ox licking up grass.

Numbers 21:20–35 Historical context

Numbers 21:20-35 describes the defeat of the Amorite kings Sihon and Og that Balak saw, prompting his fear and hiring of Balaam.

Judges 11:25 references Balak's failure to fight Israel, echoing the event where Balak hired Balaam instead of attacking directly.