'Descendants' in the Bible

"Tell Aaron, 'No man from your descendants throughout their generations who has a physical flaw is to approach to present the food of his God.

No man from the descendants of Aaron the priest who has a physical flaw may step forward to present the Lord's gifts; he has a physical flaw, so he must not step forward to present the food of his God.

Say to them, 'Throughout your generations, if any man from all your descendants approaches the holy offerings which the Israelites consecrate to the Lord while he is impure, that person must be cut off from before me. I am the Lord.

No man from the descendants of Aaron who is diseased or has a discharge may eat the holy offerings until he becomes clean. The one who touches anything made unclean by contact with a dead person, or a man who has a seminal emission,