Numbers 10:1-10 describes the silver trumpets blown at new moons, providing the practice behind this trumpet day.

Numbers 10:10 orders trumpets to be sounded at appointed festivals as a memorial—directly ties to the trumpet blast of this feast.

Numbers 28:25 also commands a holy convocation with no work, but for the Feast of Unleavened Bread — same pattern for a different feast.

Leviticus 23:24 gives the same command for a holy convocation with trumpet blasts on the first day of the seventh month.

Leviticus 23:25 adds the food offering and prohibition of work, complementing the instructions here.

Psalm 81:3 commands blowing the trumpet at the new moon, directly echoing this feast's trumpet call.

Isaiah 27:13 depicts a great trumpet summoning exiles to worship—a prophetic echo of the Feast of Trumpets' memorial blast.

Exodus 12:16 commands a sacred assembly and no work on the first day of Unleavened Bread—parallel to the same instructions for the Feast of Trumpets.

Nehemiah 8:2 places Ezra reading the Law on the first day of the seventh month — the exact day commanded as a holy convocation here.

Nehemiah 8:9 declares that day holy to the LORD, echoing the holy convocation commanded here for the Feast of Trumpets.

Ezra 3:1 describes the people gathering in the seventh month to Jerusalem, likely for the Feast of Trumpets, fulfilling this command.

Ezra 3:6 records the restored community offering burnt offerings on that same day, showing historical observance.