Ezra 3:4

4 Then in accordance with what is written, they celebrated the Festival of Tabernacles with the required number of burnt offerings prescribed for each day.

Read Ezra 3:4 Using Other Translations

They kept also the feast of tabernacles, as it is written, and offered the daily burnt offerings by number, according to the custom, as the duty of every day required;
And they kept the Feast of Booths, as it is written, and offered the daily burnt offerings by number according to the rule, as each day required,
They celebrated the Festival of Shelters as prescribed in the Law, sacrificing the number of burnt offerings specified for each day of the festival.

What does Ezra 3:4 mean?

John Gill's Exposition of the Bible
Ezra 3:4

They kept also the feast of tabernacles, as it is written
According to the rules prescribed for the observation of it in ( Leviticus 23:34-42 ) this began on the fifteenth day of the seventh month:

and offered the daily burnt offerings by number, according to the
custom, as the duty of every day required;
for on all the eight days of the feast there was a certain number of sacrifices fixed for every day; and exactly according to the law concerning them did they offer them at this time; see ( Numbers 29:12-38 ) .

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