On that day the Book of Moses was read aloud in the hearing of the people and there it was found written that no Ammonite or Moabite should ever be admitted to the assembly of God, because they had not met the isralites with food and water but hired Balaam to call down a curse on them. (Our God however, turned the curse into a blessing.) When the people heard this law, they excluded from Israel all who were of foreign descent.
>it is a lesson a grudge held.
>who you're grudging is evil keep the grudge.