'Bill' in the Bible

Thus saith Jehovah: Where is the bill of your mother's divorce, whom I have put away? or which of my creditors is it to whom I have sold you? Behold, through your iniquities have ye sold yourselves, and for your transgressions is your mother put away.

And I saw that when for all the causes wherein backsliding Israel committed adultery I had put her away, and given her a bill of divorce, yet the treacherous Judah, her sister, feared not, but went and committed fornication also.