Esther 9:27

the Jews have established and received upon them, and upon their seed, and upon all those joined unto them, and it doth not pass away, to be keeping these two days according to their writing, and according to their season, in every year and year;

Esther 8:17

and in every province and province, and in every city and city, the place where the word of the king, even his law, is coming, gladness and joy are to the Jews, a banquet, and a good day; and many of the peoples of the land are becoming Jews, for a fear of the Jews hath fallen upon them.

Isaiah 56:3

Nor speak let a son of the stranger, Who is joined unto Jehovah, saying: 'Jehovah doth certainly separate me from His people.' Nor say let the eunuch, 'Lo, I am a tree dried up,'

Isaiah 56:6

And sons of the stranger, who are joined to Jehovah, To serve Him, and to love the name of Jehovah, To be to Him for servants, Every keeper of the sabbath from polluting it, And those keeping hold on My covenant.

Zechariah 2:11

And joined have been many nations unto Jehovah in that day, And they have been to Me for a people, And I have dwelt in thy midst, And thou hast known that Jehovah of Hosts hath sent me unto thee.

Deuteronomy 5:3

not with our fathers hath Jehovah made this covenant, but with us; we -- these -- here to-day -- all of us alive.

Deuteronomy 29:14-15

'And not with you alone am I making this covenant and this oath;

Joshua 9:15

and Joshua maketh with them peace, and maketh with them a covenant, to keep them alive; and swear to them do the princes of the company.

1 Samuel 30:25

And it cometh to pass from that day and forward, that he appointeth it for a statute and for an ordinance for Israel unto this day.

2 Samuel 21:1-2

And there is a famine in the days of David three years, year after year, and David seeketh the face of Jehovah, and Jehovah saith, 'For Saul and for the bloody house, because that he put to death the Gibeonites.'

Esther 9:21

to establish on them, to be keeping the fourteenth day of the month of Adar, and the fifteenth day of it, in every year and year,

Zechariah 8:23

Thus said Jehovah of Hosts: In those days take hold do ten men of all languages of the nations, Yea, they have taken hold on the skirt of a man, a Jew, saying: We go with you, for we heard 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
not with our fathers hath Jehovah made this covenant, but with us; we -- these -- here to-day -- all of us alive.
Deuteronomy 29:14
'And not with you alone am I making this covenant and this oath;
Joshua 9:15
and Joshua maketh with them peace, and maketh with them a covenant, to keep them alive; and swear to them do the princes of the company.
1 Samuel 30:25
And it cometh to pass from that day and forward, that he appointeth it for a statute and for an ordinance for Israel unto this day.
2 Samuel 21:1
And there is a famine in the days of David three years, year after year, and David seeketh the face of Jehovah, and Jehovah saith, 'For Saul and for the bloody house, because that he put to death the Gibeonites.'

All such

Esther 8:17
and in every province and province, and in every city and city, the place where the word of the king, even his law, is coming, gladness and joy are to the Jews, a banquet, and a good day; and many of the peoples of the land are becoming Jews, for a fear of the Jews hath fallen upon them.
Isaiah 56:3
Nor speak let a son of the stranger, Who is joined unto Jehovah, saying: 'Jehovah doth certainly separate me from His people.' Nor say let the eunuch, 'Lo, I am a tree dried up,'
Zechariah 2:11
And joined have been many nations unto Jehovah in that day, And they have been to Me for a people, And I have dwelt in thy midst, And thou hast known that Jehovah of Hosts hath sent me unto thee.
Zechariah 8:23
Thus said Jehovah of Hosts: In those days take hold do ten men of all languages of the nations, Yea, they have taken hold on the skirt of a man, a Jew, saying: We go with you, for we heard God is with you!