Esther 9:27

the Jews bound themselves, their descendants, and all who joined with them to a commitment that they would not fail to celebrate these two days each and every year according to the written instructions and according to the time appointed.

Esther 8:17

In every province and every city, wherever the king’s command and his law reached, joy and rejoicing took place among the Jews. There was a celebration and a holiday. And many of the ethnic groups of the land professed themselves to be Jews because fear of the Jews had overcome them.

Isaiah 56:3

No foreigner who has joined himself to the Lord
should say,
“The Lord will exclude me from His people”;
and the eunuch should not say,
“Look, I am a dried-up tree.”

Isaiah 56:6

And the foreigners who join themselves to the Lord
minister to Him, love the name of Yahweh
and become His servants,
all who keep the Sabbath without desecrating it
and who hold firmly to My covenant—

Zechariah 2:11

“Many nations will join themselves to the Lord on that day and become My people. I will dwell among you, and you will know that the Lord of Hosts has sent Me to you.

Deuteronomy 5:3

He did not make this covenant with our fathers, but with all of us who are alive here today.

Deuteronomy 29:14-15

I am making this covenant and this oath not only with you,

Joshua 9:15

So Joshua established peace with them and made a treaty to let them live, and the leaders of the community swore an oath to them.

1 Samuel 30:25

And it has been so from that day forward. David established this policy as a law and an ordinance for Israel and it continues to this very day.

2 Samuel 21:1-2

During David’s reign there was a famine for three successive years, so David inquired of the Lord. The Lord answered, “It is because of the blood shed by Saul and his family when he killed the Gibeonites.”

Esther 9:21

He ordered them to celebrate the fourteenth and fifteenth days of the month Adar every year

Zechariah 8:23

The Lord of Hosts says this: “In those days, 10 men from nations of every language will grab the robe of a Jewish man tightly, urging: Let us go with you, for we have heard that God is with you.”

Treasury of Scripture Knowledge

Summary

The Jews ordained, and took upon them, and upon their seed, and upon all such as joined themselves unto them, so as it should not fail, that they would keep these two days according to their writing, and according to their appointed time every year;

Bible References

And upon their seed

Deuteronomy 5:3
He did not make this covenant with our fathers, but with all of us who are alive here today.
Deuteronomy 29:14
I am making this covenant and this oath not only with you,
Joshua 9:15
So Joshua established peace with them and made a treaty to let them live, and the leaders of the community swore an oath to them.
1 Samuel 30:25
And it has been so from that day forward. David established this policy as a law and an ordinance for Israel and it continues to this very day.
2 Samuel 21:1
During David’s reign there was a famine for three successive years, so David inquired of the Lord. The Lord answered, “It is because of the blood shed by Saul and his family when he killed the Gibeonites.”

All such

Esther 8:17
In every province and every city, wherever the king’s command and his law reached, joy and rejoicing took place among the Jews. There was a celebration and a holiday. And many of the ethnic groups of the land professed themselves to be Jews because fear of the Jews had overcome them.
Isaiah 56:3
No foreigner who has joined himself to the Lord
should say,
“The Lord will exclude me from His people”;
and the eunuch should not say,
“Look, I am a dried-up tree.”
Zechariah 2:11
“Many nations will join themselves to the Lord on that day and become My people. I will dwell among you, and you will know that the Lord of Hosts has sent Me to you.
Zechariah 8:23
The Lord of Hosts says this: “In those days, 10 men from nations of every language will grab the robe of a Jewish man tightly, urging: Let us go with you, for we have heard that God is with you.”

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.