Charles Ellicott Commentary Isaiah 50:1

"Thus saith Jehovah, Where is the bill of your mother`s divorcement, wherewith I have put her away? or which of my creditors is it to whom I have sold you? Behold, for your iniquities were ye sold, and for your transgressions was your mother put away." — Isaiah 50:1 (ASV)

Where is the bill ...? — The thought seems suggested by Isaiah 49:14, but expands in a different direction. Both questions imply a negative answer. Jehovah had not formally repudiated the wife (Judah) whom He had chosen (Deuteronomy 24:1) as He had done her sister Israel (Jeremiah 3:8; Hosea 2:2). He had no creditors among the nations who could claim her children. On the law of debt which supplies the image, compare Exodus 21:7; 2 Kings 4:1; Nehemiah 5:5. The divorce, the sale, were her acts and not His.