The Gemara taught that the use of the pronoun "he" (, "hu") in an introduction, as in the words "These are (, "hu") that Dathan and Abiram" in signifies that they were the same in their wickedness from the beginning to the end. Similar uses appear in to teach Esau's enduring wickedness, in to teach Ahaz's enduring wickedness, in to teach Ahasuerus's enduring wickedness, in to teach Abraham's enduring righteousness, in to teach Moses and Aaron's enduring righteousness, and in to teach David's enduring humility.