Because they (plural) Num 22:56. Deuteronomy 23:3; Deuteronomy 23:4.
children. sons.
hired Balaam. Numbers 22:5; Numbers 22:6; Joshua 24:9; Joshua 24:10.
them (singular), i.e. Israel.
curse. Hebrew. kalal = reproach, imprecate.
God. Hebrew. Elohim. App-4.