Leviticus 23:24,27
Speak to the children of Israel, saying, In the seventh month, in the first day of the month, shall you have a sabbath, a memorial of blowing of trumpets, an holy convocation.
Nave's Topical Index—AKJV

Nehemiah 8:13-15
And on the second day were gathered together the chief of the fathers of all the people, the priests, and the Levites, to Ezra the scribe, even to understand the words of the law.
Nave's Topical Index—AKJV