'Portion' in the Bible

Rather, he must acknowledge the son of the less loved wife as firstborn and give him the double portion of all he has, for that son is the beginning of his father's procreative power -- to him should go the right of the firstborn.

He has selected the best part for himself, for the portion of the ruler is set aside there; he came with the leaders of the people, he obeyed the righteous laws of the Lord and his ordinances with Israel.