'Seed' in the Bible

These were those who went up from Tel Melah, Tel Harsha, Cherub, Addan, [and] Immer; but they could not show their fathers' houses, and their seed, whether they were of Israel:

For they have taken of their daughters for themselves and for their sons, so that the holy seed have mixed themselves with the peoples of the lands. Yes, the hand of the princes and rulers has been chief in this trespass."