What did the Prophet Muhammad (saw) say about falsely claiming to be the father of someone else?
 It is reported on the authority of Sa'd b. Abi Waqqas:                      Both of my ears heard the Messenger of Allah saying this: He who claimed the fatherhood of anyone else besides his real father knowingly (committed a great sin) ;Paradise is forbidden to him. Abu Bakra asserted that he too heard it from the Messenger of Allah (may peace be upon him ).