Ezra 3:1
And when the seventh month was come, and the children of Israel were in the cities, the people gathered themselves together as one man to Jerusalem.
Cross-reference
Exodus 23:14-17 commands three annual feasts; gathering in the seventh month aligns with the Feast of Ingathering.
Leviticus 23:24 commands a holy convocation on the first day of the seventh month — the very time of this gathering.
Leviticus 23:27-44 outlines the seventh month's feasts (Atonement and Tabernacles); this gathering initiates those observances.
In Judges 20:1, the exact phrase 'gathered together as one man' describes Israel's unity — the same idiom used here.
In Nehemiah 8:1, the same phrase 'gathered as one man' is used for the assembly at the Water Gate.
In Nehemiah 8:2, Ezra reads the Law on the first day of the seventh month — the same gathering context as here.
Jeremiah 30:3 prophesies the return from captivity; Ezra 3:1 shows the people gathering in Jerusalem as part of that restoration.
In Numbers 29:1-40, the seventh month is appointed for feasts (Trumpets, Atonement, Tabernacles) — the same month the people gather as one in Ezra 3:1.
Leviticus 16:29 specifies the seventh month's tenth day as a day of affliction; this general gathering may precede that observance.
In Nehemiah 8:14, the feast of booths in the seventh month is mentioned, linking to the same month in Ezra.
In 1 Kings 8:1, Solomon assembles all Israel for the ark dedication — a national gathering parallel.