Leviticus 23:34 commands the Feast of Booths on the fifteenth day of the seventh month — the law they discovered.

Leviticus 23:40-43 gives detailed instructions for dwelling in booths during the feast — the specific commands they found.

In Leviticus 23:42, this is the direct command to dwell in booths during the Feast of Tabernacles, rediscovered here.

In Ezra 3:4, the Feast of Booths is kept according to the law, exactly the same observance commanded here.

Exodus 23:16 commands the Feast of Ingathering (Booths) at year's end — another law for this feast.

In Numbers 29:12, this specifies the fifteenth day of the seventh month as a holy convocation for the same feast observed here.

Deuteronomy 16:13-15 also commands the Feast of Booths, with an emphasis on rejoicing — another source for the law.

Ezekiel 45:25 also describes the Feast of the seventh month (Tabernacles) as a seven-day festival, reinforcing the same OT command discovered here.

John 7:2 mentions the Feast of Booths was near — showing this feast was still observed in Jesus' day.

In 1 Kings 8:2, this mentions the feast in the seventh month (Ethanim), the same feast being kept here.

Zechariah 14:16-19 prophesies that all nations will celebrate the Feast of Booths in the future — extending its significance.