Yevamot 79a and Yevamot 79b, the story of the Givonim and how David came to prohibit ordinary Jews marrying them, and then on to serisim, men who cannot reproduce either congenitally or because of human administered injury.
Yevamot 79a and Yevamot 79b, the story of the Givonim and how David came to prohibit ordinary Jews marrying them, and then on to serisim, men who cannot reproduce either congenitally or because of human administered injury.