'Children of Israel' in the Bible

Nevertheless, I have a few things against you, that you have there, them who hold the doctrine of Balaam, who taught Balak to cast a stumbling block before the children of Israel, to eat things sacrificed to idols, and to commit fornication.

And I heard the number of those that were sealed: one hundred and forty-four thousand, who were sealed out of every tribe of the children of Israel.