Esther 9:31

To set up these days of Purim in their times, as Mordecai the Jew set up to them, and Esther the queen, and as they set up for their souls and for their seed, the words of fastings and their cry:

Esther 4:3

And in every province and province the place where the word of the king and his edict coming, great mourning to the Jews, and fasting and weeping and wailing; sackcloth and ashes will be spread to many.

Esther 4:16

Go collect together all the Jews being found in Shushan, and fast ye for me, and ye shall not eat and ye shall not drink three days, night and day also I and my maidens will fast thus and in this I will go in to the king which is not according to the edict; and according to that I perished, I perished.

Jonah 3:2-9

Arise, go to Nineveh the great city, and call to it the calling which I speak to thee.

Treasury of Scripture Knowledge

Summary

To confirm these days of Purim in their times appointed, according as Mordecai the Jew and Esther the queen had enjoined them, and as they had decreed for themselves and for their seed, the matters of the fastings and their cry.

And for their seed

The fastings

Bible References

And for their seed

Esther 9:27
The Jews set up and admitted upon them, and upon their seed, and upon all joining themselves to them, and they shall not pass by to be doing these two days according to their writing, and according to their time in every year and year;

The fastings

Esther 4:3
And in every province and province the place where the word of the king and his edict coming, great mourning to the Jews, and fasting and weeping and wailing; sackcloth and ashes will be spread to many.
Jonah 3:2
Arise, go to Nineveh the great city, and call to it the calling which I speak to thee.