'Descendants' in the Bible

And Haman told Zeresh his wife and all his friends all that had happened to him. And his advisers and Zeresh his wife said to him, "If Mordecai, before whom you have begun to fall, [is] {from the descendants of the Jews}, you will not prevail against him, but will certainly fall before him."

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.

These days are remembered and celebrated by every generation, family, province, and city, so that these days of Purim will not lose their significance in Jewish life and their memory will not fade from their descendants.

in order to confirm these days of Purim at their proper time just as Mordecai the Jew and Queen Esther had established them and just as they had committed themselves and their descendants to the practices of fasting and lamentation.

Mordecai the Jew was second only to King Ahasuerus. He was the highest-ranking Jew, and he was admired by his numerous relatives. He worked enthusiastically for the good of his people and was an advocate for the welfare of all his descendants.