What is the ruling on bearing false witness when a colleague asks one to do so for the purpose of obtaining compensation for an injury that did not occur at the workplace?

Your colleague asked you to testify that his hand was broken at work, while it was broken at home. This is forbidden, and your testimony to that effect would be a false testimony, which is one of the major sins and destructive acts. The Prophet, peace and blessings be upon him, said: "Shall I not inform you of the greatest of the major sins? Associating partners with Allah, disobedience to parents, and indeed, false speech and false testimony." So, beware of agreeing to this request.