Esther 9:31

Giving the force of law to these days of Purim at their fixed times, as they had been ordered by Mordecai the Jew and Esther the queen, and in keeping with the rules they had made for themselves and their seed, in connection with their time of going without food and their cry for help.

Esther 4:3

And in every part of the kingdom, wherever the king's word and his order came, there was great sorrow among the Jews, and weeping and crying and going without food; and numbers of them were stretched on the earth covered with dust and haircloth.

Esther 4:16

Go, get together all the Jews who are present in Shushan, and go without food for me, taking no food or drink night or day for three days: and I and my women will do the same; and so I will go in to the king, which is against the law: and if death is to be my fate, then let it come.

Jonah 3:2-9

Up! go to Nineveh, that great town, and give it the word which I have given you.

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 made a rule and gave an undertaking, causing their seed and all those who were joined to them to do the same, so that it might be in force for ever, that they would keep those two days, as ordered in the letter, at the fixed time every year;

The fastings

Esther 4:3
And in every part of the kingdom, wherever the king's word and his order came, there was great sorrow among the Jews, and weeping and crying and going without food; and numbers of them were stretched on the earth covered with dust and haircloth.
Jonah 3:2
Up! go to Nineveh, that great town, and give it the word which I have given you.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain