Those of Israelite descent separated themselves from all the foreigners, and they stood and confessed their sins and the iniquities of their fathers.
We have here a general account of a public fast which the children of Israel kept, probably by order from Nehemiah, by and with the advice and consent of the chief of the fathers. It was a fast that men appointed, but such a fast as God had chosen; for, 1. It was a day to afflict the soul, Isa 58:5.
Commenting on Nehemiah 9:1-3
And the seed of Israel separated themselves from all strangers,.... Such as were genuine Israelites, of the seed of Abraham, who had married wives of the Gentiles, strangers to the commonwealth of Israel, either before the reformation by Ezra, not being then discovered, or had fallen into this evil since; but now, on the reading of the law, were convinced of it, and so separated...
confessed their sins, and the iniquities of their fathers--Not only did they read in their recent sufferings a punishment of the national apostasy and guilt, but they had made themselves partakers of their fathers' sins by following the same evil ways.