Bible Verses About Patriarchal Government: Arbitrarily disinheriting and putting away servants and children

Avraham got up early in the morning, took bread and a skin of water and gave it to Hagar, putting it on her shoulder, and the child; then he sent her away. After leaving, she wandered in the desert around Be'er-Sheva.

The sons of Re'uven the firstborn of Isra'el - he was the firstborn, but because he defiled his father's bed, his birthright was given to the sons of Yosef the son of Isra'el, though not in such a way as for him to be regarded in the genealogy as the firstborn.