'Less' in the Bible

Suppose a man has two wives, one whom he loves more than the other, and they both bear him sons, with the firstborn being the child of the less loved wife.

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.

For I have knowledge of your hard and uncontrolled hearts: even now, while I am still living, you will not be ruled by the Lord; how much less after my death?